Revert Sticky Keys (and everything related to that)

Our current keymap doesn't give us enough room to make such changes in
the event system. To fix small issues caused by this, we would need to do
drastic changes in Blender's keymaps and internal handling. It was worth
a try, but it didn't work.

I can write down a more descriptive statement in a few days, but for now
I need a break of this stuff.

release/scripts/startup/bl_ui/space_userpref.py

@@ -1055,15 +1055,6 @@ class USERPREF_PT_input(Panel):
         subrow.menu("USERPREF_MT_interaction_presets", text=bpy.types.USERPREF_MT_interaction_presets.bl_label)
         subrow.operator("wm.interaction_preset_add", text="", icon='ZOOMIN')
         subrow.operator("wm.interaction_preset_add", text="", icon='ZOOMOUT').remove_active = True
-
-        sub.separator()
-
-        sub = col.column()
-        sub.label(text="Double Click:")
-        sub.prop(inputs, "double_click_time", text="Speed")
-        sub.label(text="Sticky Keys:")
-        sub.prop(inputs, "click_timeout")
-
         sub.separator()
 
         sub.label(text="Mouse:")
@@ -1077,6 +1068,10 @@ class USERPREF_PT_input(Panel):
         sub.label(text="Select With:")
         sub.row().prop(inputs, "select_mouse", expand=True)
 
+        sub = col.column()
+        sub.label(text="Double Click:")
+        sub.prop(inputs, "mouse_double_click_time", text="Speed")
+
         sub.separator()
 
         sub.prop(inputs, "use_emulate_numpad")