Fixed various project warnings. Completely disabled nullability checks, went down from ~20k to 195.

Riot/Modules/MatrixKit/Models/Account/MXKAccountManager.m

@@ -104,6 +104,8 @@ NSString *const MXKAccountManagerDataType = @"org.matrix.kit.MXKAccountManagerDa
     }
 }
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated"
 - (void)saveAccounts
 {
     NSDate *startDate = [NSDate date];
@@ -123,6 +125,7 @@ NSString *const MXKAccountManagerDataType = @"org.matrix.kit.MXKAccountManagerDa
 
     MXLogDebug(@"[MXKAccountManager] saveAccounts. Done (result: %@) in %.0fms", @(result), [[NSDate date] timeIntervalSinceDate:startDate] * 1000);
 }
+#pragma clang diagnostic pop
 
 - (void)addAccount:(MXKAccount *)account andOpenSession:(BOOL)openSession
 {
@@ -608,6 +611,8 @@ NSString *const MXKAccountManagerDataType = @"org.matrix.kit.MXKAccountManagerDa
     return [matrixKitCacheFolder stringByAppendingPathComponent:kMXKAccountsKey];
 }
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated"
 - (void)loadAccounts
 {
     MXLogDebug(@"[MXKAccountManager] loadAccounts");
@@ -675,6 +680,7 @@ NSString *const MXKAccountManagerDataType = @"org.matrix.kit.MXKAccountManagerDa
         mxAccounts = [NSMutableArray array];
     }
 }
+#pragma clang diagnostic pop
 
 - (NSData*)encryptData:(NSData*)data
 {
@@ -708,6 +714,8 @@ NSString *const MXKAccountManagerDataType = @"org.matrix.kit.MXKAccountManagerDa
     return data;
 }
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated"
 - (void)migrateAccounts
 {
     NSString *pathOld = [[MXKAppSettings cacheFolder] stringByAppendingPathComponent:kMXKAccountsKeyOld];
@@ -727,6 +735,7 @@ NSString *const MXKAccountManagerDataType = @"org.matrix.kit.MXKAccountManagerDa
         [fileManager removeItemAtPath:pathOld error:nil];
     }
 }
+#pragma clang diagnostic pop
 
 - (void)readAndWriteCredentials:(void (^)(NSArray<MXCredentials*> * _Nullable readData,  void (^completion)(BOOL didUpdateCredentials)))readAnWriteHandler
 {

Riot/Modules/MatrixKit/Models/Contact/MXKContact.h

@@ -93,6 +93,8 @@ extern NSString *const kMXKContactDefaultContactPrefixId;
  */
 - (void)resetMatrixThumbnail;
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated"
 /**
  The contact ID from native phonebook record
  */
@@ -105,6 +107,7 @@ extern NSString *const kMXKContactDefaultContactPrefixId;
  @return MXKContact instance
  */
 - (id)initLocalContactWithABRecord:(ABRecordRef)record;
+#pragma clang diagnostic pop
 
 /**
  Create a matrix contact with the dedicated info

Riot/Modules/MatrixKit/Models/Contact/MXKContact.m

@@ -40,6 +40,8 @@ NSString *const kMXKContactDefaultContactPrefixId = @"Default_";
 @implementation MXKContact
 @synthesize isMatrixContact, isThirdPartyInvite;
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
 + (NSString*)contactID:(ABRecordRef)record
 {
     return [NSString stringWithFormat:@"%@%d", kMXKContactLocalContactPrefixId, ABRecordGetRecordID(record)];
@@ -217,6 +219,7 @@ NSString *const kMXKContactDefaultContactPrefixId = @"Default_";
     }
     return self;
 }
+#pragma clang diagnostic pop
 
 - (id)initMatrixContactWithDisplayName:(NSString*)displayName andMatrixID:(NSString*)matrixID
 {

Riot/Modules/MatrixKit/Models/Contact/MXKContactManager.m

@@ -537,6 +537,8 @@ NSString *const MXKContactManagerDataType = @"org.matrix.kit.MXKContactManagerDa
     }
 }
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
 - (void)refreshLocalContacts
 {
     MXLogDebug(@"[MXKContactManager] refreshLocalContacts : Started");
@@ -721,6 +723,7 @@ NSString *const MXKContactManagerDataType = @"org.matrix.kit.MXKContactManagerDa
         });
     }
 }
+#pragma clang diagnostic pop
 
 - (void)updateMatrixIDsForLocalContact:(MXKContact *)contact
 {
@@ -1582,6 +1585,9 @@ static NSString *matrixIDsDictFile = @"matrixIDsDictV2";
 static NSString *localContactsFile = @"localContactsV2";
 static NSString *contactsBookInfoFile = @"contactsV2";
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+
 - (NSString*)dataFilePathForComponent:(NSString*)component
 {
     NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
@@ -1857,6 +1863,8 @@ static NSString *contactsBookInfoFile = @"contactsV2";
     }
 }
 
+#pragma clang diagnostic pop
+
 - (BOOL)encryptAndSaveData:(NSData*)data toFile:(NSString*)fileName
 {
     NSError *error = nil;

Riot/Modules/MatrixKit/Models/MXKAppSettings.m

@@ -670,6 +670,8 @@ static NSString *const kMXAppGroupID = @"group.org.matrix";
     }
 }
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated"
 - (NSString*)phonebookCountryCode
 {
     NSString* res = phonebookCountryCode;
@@ -699,6 +701,7 @@ static NSString *const kMXAppGroupID = @"group.org.matrix";
     
     return res;
 }
+#pragma clang diagnostic pop
 
 - (void)setPhonebookCountryCode:(NSString *)stringValue
 {

Riot/Modules/MatrixKit/Models/RoomList/MXKSessionRecentsDataSource.h

@@ -30,8 +30,8 @@ extern NSString *const kMXKRecentCellIdentifier;
 
 /**
  The recents data source based on a unique matrix session.
+ Deprecated: Please see MXSession.roomListDataManager
  */
-MXK_DEPRECATED_ATTRIBUTE_WITH_MSG("See MXSession.roomListDataManager")
 @interface MXKSessionRecentsDataSource : MXKDataSource {
 
 @protected