Looks like theme importing is unnecessarily complex, we could create a plugin or built-in method to import/export themes for syntax highlighting and environment colours.
Hell yea... It is quite to complicated. Also the colour settings are located all over the place...
1) Settings->Environment->Colours
2) Settings->Environment->Docking system
3) Settings->Editor->General settings->Other editor settings
4) Settings->Editor->Margins and caret
5) Settings->Editor->Syntax highlighting
then there are all plugins....
it is a mess....