Mod Checker Reworked

Mod Checker Reworked 0.2.2 Update

- Removed Background Images: Removed the background images (not yet implemented anyway) from the MissingModsScreen to reduce the JAR file size by a lot!

- UI Update for Missing Mods: Updated the MissingModsScreen to display only the "Download automatically" button, a text with the missing mods and the restart button when more than 5 mods are missing. Individual download buttons are shown only if 5 or fewer mods are missing.

- Renamed Configuration File: Renamed the configuration file from ftb_checker_reworked.json to mod_checker_reworked.json.