Improving Lua Method Editor settings

[damiensellier]

Improving Lua Method Editor settings must be improved to set up custom elements colours.

Ask for @dobo365 mods and merge code :

[dobo365]

Renamed Settings to Preferences to be closer to other programs.
Adapted popup with extra properties. Use of color dialog popup. Better look (see picture above)

Code editor Preferences.zip

Source - UIcomponents - CtrlrLua - MethodEditor - CtrlrLuaMethodCodeEditorSettings.cpp and .h
CtrlrLuaMethodCodeEditor.cpp
CtrlrLuaMethodEditor.cpp
CtrlrIDs.h: add

    DECLARE_ID (luaMethodEditorLineNumbersBgColour);
    DECLARE_ID (luaMethodEditorLineNumbersColour);

Still to do: secure that the selected colors are kept through sessions.