Dismiss description textview on user tap on background.

Riot/Modules/BugReport/BugReportViewController.m

@@ -133,6 +133,9 @@
         
     }];
     [self userInterfaceThemeDidChange];
+    
+    UIGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(backgroundViewTapped)];
+    [self.view addGestureRecognizer:recognizer];
 }
 
 - (void)userInterfaceThemeDidChange
@@ -450,4 +453,9 @@
     self.sendScreenshot = !self.sendScreenshot;
 }
 
+- (void)backgroundViewTapped {
+    // Dismiss keyboard if user taps on background view: https://github.com/vector-im/element-ios/issues/3819
+    [self.bugReportDescriptionTextView resignFirstResponder];
+}
+
 @end