SCI32: Non-titled text bitmap implementation

This implementation is not 100% engine accurate, but it is
more accurate than what was there, and hopefully the differences
between this and the engine code are merely cosmetic.

The known (intentional) differences are:

1. Uses ScummVM rects inside the engine code, converting to/from
   SCI rects on the kernel edges and when scaling
2. Fewer side effects when performing operations that *should*
   have been pure from the start (like text dimension calculation).
   Still not side-effect-free, but at least things like colours
   and alignment do not need to be reset every time a measurement
   is taken, unlike in the actual engine.

Editor controls and some other kBitmap code are temporarily
disabled as a result of changes to GfxText32 until they can be
updated to be engine-accurate.

engines/sci/graphics/controls32.cpp

@@ -178,11 +178,14 @@ void GfxControls32::kernelTexteditChange(reg_t controlObject) {
 			// Write back string
 			_segMan->strcpy(textReference, text.c_str());
 			// Modify the buffer and show it
+			warning("kernelTexteditChange");
+#if 0
 			_text->createTextBitmap(controlObject, 0, 0, hunkId);
 
 			_text->drawTextBitmap(0, 0, nsRect, controlObject);
 			//texteditCursorDraw(rect, text.c_str(), cursorPos);	// TODO: Cursor
 			g_system->updateScreen();
+#endif
 		} else {
 			// TODO: Cursor
 			/*