Add CTD layout support on the editor

[Xeeynamo]

Currently the CTD editor can render the text correctly, but it misses some features like scaling, hook position and text alignment.

It also misses the support to edit the layout descriptor that drives the logic on how the text should be rendered on the PSP screen.

The following steps needs to be done in order to close this issue:

• Add a UI for the layout
• Ensure that the changes are persistent once the CTD file is saved
• Improve CtdDrawHandler to be as close as possible to what the original game engine does