Add Unreal versions for ndisplayextensions plugin

plugins.config

-
 [unreal-cave-overlay]
     name=Cave Overlay
     url=https://devhub.vr.rwth-aachen.de/VR-Group/unreal-development/unreal-cave-overlay.git
@@ -14,6 +13,14 @@
 [ndisplayextensions]
     name=nDisplay Extensions
     url=https://devhub.vr.rwth-aachen.de/VR-Group/unreal-development/ndisplayextensions.git
+[ndisplayextensions "deprecated/4-21"]
+    unreal-versions=4.21
+[ndisplayextensions "deprecated/4-22"]
+    unreal-versions=4.22
+[ndisplayextensions "develop"]
+    unreal-versions=4.26
+[ndisplayextensions "master"]
+    unreal-versions=4.22
 
 [NDisplayLaunchButton]
     name=nDisplay Launch Button