Removing ExtJS v4 - step #1

Authored by Osnard on Sep 15 2017, 3:20 PM.

Description

Removing ExtJS v4 - step #1

BlueSpice 3 will build upon ExtJS v6 provided by [[mw:Extension:ExtJSBase]].

Change-Id: I28de28629debd7810b7834876b23eb5e859d2d0a