Cleanup (UI): Make space for more internal button flags

Having to manually increase all other flag values to be able to add a
new internal flag is quite annoying. Just make space for a few more
once.
Generally I'd say internal flags are preferable, since it increases
encapsulation. So good to avoid making this a hassle.

source/blender/editors/include/UI_interface.h

@@ -184,50 +184,50 @@ enum {
 
 /** #uiBut.flag general state flags. */
 enum {
-  /* WARNING: the first 7 flags are internal (see #UI_SELECT definition). */
-  UI_BUT_ICON_SUBMENU = 1 << 7,
-  UI_BUT_ICON_PREVIEW = 1 << 8,
+  /* WARNING: the first 10 flags are internal (see #UI_SELECT definition). */
+  UI_BUT_ICON_SUBMENU = 1 << 10,
+  UI_BUT_ICON_PREVIEW = 1 << 11,
 
-  UI_BUT_NODE_LINK = 1 << 9,
-  UI_BUT_NODE_ACTIVE = 1 << 10,
-  UI_BUT_DRAG_LOCK = 1 << 11,
+  UI_BUT_NODE_LINK = 1 << 12,
+  UI_BUT_NODE_ACTIVE = 1 << 13,
+  UI_BUT_DRAG_LOCK = 1 << 14,
   /** Grayed out and un-editable. */
-  UI_BUT_DISABLED = 1 << 12,
+  UI_BUT_DISABLED = 1 << 15,
 
-  UI_BUT_ANIMATED = 1 << 13,
-  UI_BUT_ANIMATED_KEY = 1 << 14,
-  UI_BUT_DRIVEN = 1 << 15,
-  UI_BUT_REDALERT = 1 << 16,
+  UI_BUT_ANIMATED = 1 << 16,
+  UI_BUT_ANIMATED_KEY = 1 << 17,
+  UI_BUT_DRIVEN = 1 << 18,
+  UI_BUT_REDALERT = 1 << 19,
   /** Grayed out but still editable. */
-  UI_BUT_INACTIVE = 1 << 17,
-  UI_BUT_LAST_ACTIVE = 1 << 18,
-  UI_BUT_UNDO = 1 << 19,
-  UI_BUT_IMMEDIATE = 1 << 20,
-  UI_BUT_NO_UTF8 = 1 << 21,
+  UI_BUT_INACTIVE = 1 << 20,
+  UI_BUT_LAST_ACTIVE = 1 << 21,
+  UI_BUT_UNDO = 1 << 22,
+  UI_BUT_IMMEDIATE = 1 << 23,
+  UI_BUT_NO_UTF8 = 1 << 24,
 
   /** For popups, pressing return activates this button, overriding the highlighted button.
    * For non-popups this is just used as a display hint for the user to let them
    * know the action which is activated when pressing return (file selector for eg). */
-  UI_BUT_ACTIVE_DEFAULT = 1 << 23,
+  UI_BUT_ACTIVE_DEFAULT = 1 << 25,
 
   /** This but is "inside" a list item (currently used to change theme colors). */
-  UI_BUT_LIST_ITEM = 1 << 24,
+  UI_BUT_LIST_ITEM = 1 << 26,
   /** edit this button as well as the active button (not just dragging) */
-  UI_BUT_DRAG_MULTI = 1 << 25,
+  UI_BUT_DRAG_MULTI = 1 << 27,
   /** Use for popups to start editing the button on initialization. */
-  UI_BUT_ACTIVATE_ON_INIT = 1 << 26,
+  UI_BUT_ACTIVATE_ON_INIT = 1 << 28,
 
   /** #uiBut.str contains #UI_SEP_CHAR, used for key shortcuts */
-  UI_BUT_HAS_SEP_CHAR = 1 << 27,
+  UI_BUT_HAS_SEP_CHAR = 1 << 29,
   /** Don't run updates while dragging (needed in rare cases). */
-  UI_BUT_UPDATE_DELAY = 1 << 28,
+  UI_BUT_UPDATE_DELAY = 1u << 30,
   /** When widget is in text-edit mode, update value on each char stroke. */
-  UI_BUT_TEXTEDIT_UPDATE = 1 << 29,
+  UI_BUT_TEXTEDIT_UPDATE = 1ul << 31,
   /** Show 'x' icon to clear/unlink value of text or search button. */
-  UI_BUT_VALUE_CLEAR = 1 << 30,
+  UI_BUT_VALUE_CLEAR = 1ul << 32,
 
   /** RNA property of the button is overridden from linked reference data. */
-  UI_BUT_OVERRIDDEN = 1u << 31u,
+  UI_BUT_OVERRIDDEN = 1ul << 33,
 };
 
 /* Default font size for normal text. */

source/blender/editors/interface/interface_intern.h

@@ -74,7 +74,8 @@ enum {
   UI_SELECT_DRAW = (1 << 5),
   /** Property search filter is active and the button does not match. */
   UI_SEARCH_FILTER_NO_MATCH = (1 << 6),
-  /* WARNING: rest of #uiBut.flag in UI_interface.h */
+
+  /* WARNING: rest of #uiBut.flag in UI_interface.h (starting at `1 << 10`). */
 };
 
 /** #uiBut.dragflag */