- fixes in material buttons (still tentative design!)

- cutoff of text in menus and buttons now even better!
- size of pull-up menu buttons is corrected
- pressing at 'menu button' had a delay, fixed

General: the 'outo open' wont become default, it will be removed or
become a user option. I am experimenting with it to get it all OK.
The 'auto open' for secondary levels in pulldowns will remain there

Check the latest state of pull-up menu buttons. for example the mode
selector: you can use such buttons in three ways,

- click on it, it opens and you can select
- click-and-hold-mouse, move, release at item you want to select
- move mouse over button, wait, it opens

The 'auto open' and its time threshold both can be user settings.

source/blender/src/space.c

@@ -2046,7 +2046,11 @@ void winqreadbutspace(ScrArea *sa, void *spacedata, BWinEvent *evt)
 			nr= pupmenu("Align buttons%t|Free %x0|Horizontal%x1|Vertical%x2");
 			if (nr>=0) {
 				sbuts->align= nr;
-				if(nr) uiAnimatePanels(sa);	
+				if(nr) {
+					// uiAnimatePanels(sa);	
+					uiAlignPanelStep(sa, 1.0);
+					do_buts_buttons(B_BUTSHOME);
+				}
 			}
 
 			break;