More themes

[jbaron]

Also create some darker themes (otherwise same look&feel) and set the editors background/theme accordingly.

[jbaron]

Enabled more themes for the editor. Looking if based on the editor theme can also change the IDE theme, using the same colors (like the old version of CATS) with the method called "assimilate".

Problem is that Qooxdoo uses many color definitions.

[dtrillo]

I have started to use CATS 2.0.397, and I miss some themes existing in previous version. I use "Simple" , I a really don't like those colorful themes. Also, I miss clear themes!