* We add a button with a link icon to indicate that it goes to the
resource details. We'll re-use the crosshair as a visual metaphor for
any interactive widget that goes to the resource inspector.
* To remove any possible confusion, we change the icon for the texture
list and locked tabs in the texture viewer to not include the link.
* Dock panels shouldn't have any frame border or anything like that.
* They should have an external margin of 3 pixels at their border,
but then no further margins on the layouts (like sub-controls for
the pipeline state views.
* Toolbars should be Raised & Panel frames. Later we'll replace them
with actual QToolBars to better customise the painting.
* 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