* Make MakeWidget* functions take enum colour
* Make windows A-D use WindowColour enum
* Make windows E-G use WindowColour enum
* Make windows I-M use WindowColour enum
* Make windows N-P use WindowColour enum
* Make windows R-S use WindowColour enum
* Make windows T use WindowColour enum
* Make windows V-W use WindowColour enum
* Fix#11570 - create gfx_draw_string_centered() overload
I created the overload, updated all calls from the old function to the new and deleted the old one
Change window lay-out to more closely resemble others by introducing
density buttons, along with new sprites.
The amount of elements varies by density as follows:
* Low: number of elements equal to tool size
* Medium: twice as many elements as the tool size
* High: three times as many elements as the tool size.
Remove extraneous 'retry' clause.