core: moved sat_tmp.wokkel install sat_plugin:

This patch need to be installed early so it's available before anything imports
`wokkel.data_form`.

sat/plugins/__init__.py

@@ -1,4 +0,0 @@
-# XXX: the Monkey Patch is here and not in src/__init__ to avoir issues with pyjamas compilation
-# TODO: remove this when changes are merged in Wokkel
-from sat_tmp.wokkel import install
-install()

twisted/plugins/sat_plugin.py

@@ -26,6 +26,11 @@ from twisted.application.service import IServiceMaker
 from sat.core.constants import Const as C
 from sat.core.i18n import _
 
+from sat_tmp.wokkel import install as install_wokkel_patches
+
+
+install_wokkel_patches()
+
 
 def initialise(options):
     """Method to initialise global modules"""