Action Editor: Move up/down buttons to be before the datablock selector

It turned out that the constantly changing width of the datablock selector
made it a pain to use these to quickly toggle between different actions,
as the buttons would keep jumping around, thus leading to errors when
quickly toggling between actions. This way doesn't look quite as great,
but should be more usable.

release/scripts/startup/bl_ui/space_dopesheet.py

@@ -114,12 +114,12 @@ class DOPESHEET_HT_header(Header):
         layout.prop(st, "mode", text="")
 
         if st.mode in {'ACTION', 'SHAPEKEY'}:
-            layout.template_ID(st, "action", new="action.new")
-
             row = layout.row(align=True)
             row.operator("action.layer_prev", text="", icon='TRIA_DOWN')
             row.operator("action.layer_next", text="", icon='TRIA_UP')
 
+            layout.template_ID(st, "action", new="action.new")
+
             row = layout.row(align=True)
             row.operator("action.push_down", text="Push Down", icon='NLA_PUSHDOWN')
             row.operator("action.stash", text="Stash", icon='FREEZE')