[HTML5] Fix web editor "clear persistent data".
[HTML5] Fix web editor "clear persistent data".

Was broken after update to new persistent path "/home/web_user".

(cherry picked from commit 7866cd5881a0e30dcc2ef64477e79bf8bcb69200)

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot