+InputBox handles cursor
      Handled key: Backspace, delete, left-right keys, start, end
      For now doesn't handle selecting
Mod-loading exception made more verbose
* Fixed potential NPE if currGui was null
- Removed color resetting, since it's useless: When painting should ALWAYS specify the color
- Removed redundant code

* Fixed typo
* Improved exception handling when dynamically adding a folder to the classpath