Revert #119181: Popover Button Padding for Arrow

Reverting aa328e898e as this causes unintended changes elsewhere. Even
if made more conservative with just allowing UI_LAYOUT_PANEL and
force_menu.  Will need further investigation for a better solution.

Pull Request: https://projects.blender.org/blender/blender/pulls/119187

source/blender/editors/interface/interface_layout.cc

@@ -2994,8 +2994,7 @@ static uiBut *ui_item_menu(uiLayout *layout,
   }
 
   uiTextIconPadFactor pad_factor = ui_text_pad_compact;
-  /* Ugly! Extra padding in specific circumstances. */
-  if (layout->root->type == UI_LAYOUT_HEADER || force_menu) {
+  if (layout->root->type == UI_LAYOUT_HEADER) { /* Ugly! */
     if (icon == ICON_NONE && force_menu) {
       /* pass */
     }