Bug fix 1432;

When you PAD-enter on a popup-number button (like for add circle) it
accidentally de/increased the value before assigning an "OK". Fixed.

Also: restored functionality that allows to use Enter keys as a mouse
button click. This de/increases values now, opens menus, etc. Not in
pupup or pulldown menus though!

source/blender/include/interface.h

@@ -187,7 +187,7 @@ struct uiBlock {
 	float xofs, yofs;  	// offset to parent button
 	rctf parentrct;		// for pulldowns, rect the mouse is allowed outside of menu (parent button)
 	rctf safety;		// pulldowns, to detect outside, can differ per case how it is created
-	
+
 	rctf flush;			// rect to be flushed to frontbuffer
 	int handler;		// for panels in other windows than buttonswin... just event code
 };