Implemented more user requests. Bug fixes.

Full changelog

• Add a setting to change how the image viewer is controlled. By default tapping once will show/hide the ui and double tap will zoom in. Add a new control style where single tap closes the image viewer and double tap show/hide the ui.
• Add option to hide actions in the rich text editor toolbar.
• Add setting to show labels for items in the rich text editor toolbar.
• Add a new option in the post menu: Hide posts like this. Offers a convenient way to hide posts by keywords.
• Fix a bug where RTL names are not displayed correctly.
• Fix a bug where the local stats screen did not limit the length of some of the categories.
• Fix a bug where spoiler titles are not shown if they contain formatting.
• Fix a bug where the account creation date is listed in a confusing way.