* This is a bit less ambiguous and less confusing in the case where
someone is expecting a "compile" type button instead of "save changes"
type button.
* This was only added because the default tree widget controls don't
render any grid lines. Now that we're custom drawing them, the row
colors are distracting and can be confusing on themes where the
selected row is very faint.
* Since we're promoting everything, we reset the behaviour of
RDTreeWidget so that it's not doing anything different by default.
* RDTreeWidget's interface is a bit different, exposing some useful
things like a single selected item and so on.
* We also can't set columns in the Qt Creator UI anymore, so we set them
from code.
* Unfortunately scintilla assumes its headers are all in the search path
so where possible we only add those folders when compiling scintilla
source, not our own.
baldurk