feat(gui): explanation to options enabled or disabled per folder type (#9367)

Currently, some options are automatically enabled or disabled depending
on the folder type. However, there is no explanation in the GUI on why
the options are like that. Thus, add short explanatory notes to each
case, where the option is either disabled or enabled according to the
current folder type.

gui/default/assets/lang/lang-en.json

@@ -27,6 +27,7 @@
     "Allowed Networks": "Allowed Networks",
     "Alphabetic": "Alphabetic",
     "Altered by ignoring deletes.": "Altered by ignoring deletes.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "Always turned on when the folder type is \"{{foldertype}}\".",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.",
     "Anonymous Usage Reporting": "Anonymous Usage Reporting",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "Anonymous usage report format has changed. Would you like to move to the new format?",
@@ -52,6 +53,7 @@
     "Body:": "Body:",
     "Bugs": "Bugs",
     "Cancel": "Cancel",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "Cannot be enabled when the folder type is \"{{foldertype}}\".",
     "Changelog": "Changelog",
     "Clean out after": "Clean out after",
     "Cleaning Versions": "Cleaning Versions",