fmbt-editor: X axis menu moved to the Coverage tab
fmbt-editor: X axis menu moved to the Coverage tab

Refactored event filters that show menus when right-clicking tabs,
removed coverage E and X menu options.

pombreda/fMBT,pablovirolainen/fMBT,pombreda/fMBT,mlq/fMBT,heivi/fMBT,rseymour/fMBT,heivi/fMBT,yoonkiss/fMBT,heivi/fMBT,OMKR/fMBT,giantpinkwalrus/fMBT,pombreda/fMBT,pyykkis/fMBT,01org/fMBT,pablovirolainen/fMBT,01org/fMBT,pyykkis/fMBT,pyykkis/fMBT,giantpinkwalrus/fMBT,pombreda/fMBT,yoonkiss/fMBT,OMKR/fMBT,pyykkis/fMBT,heivi/fMBT,violep01/fMBT,CosminNiculae/fMBT,rseymour/fMBT,mixu-/fMBT,mlq/fMBT,pombreda/fMBT,acozzette/fMBT,CosminNiculae/fMBT,violep01/fMBT,violep01/fMBT,giantpinkwalrus/fMBT,CosminNiculae/fMBT,OMKR/fMBT,rseymour/fMBT,CosminNiculae/fMBT,acozzette/fMBT,acozzette/fMBT,pablovirolainen/fMBT,CosminNiculae/fMBT,01org/fMBT,OMKR/fMBT,OMKR/fMBT,pablovirolainen/fMBT,rseymour/fMBT,yoonkiss/fMBT,rseymour/fMBT,01org/fMBT,heivi/fMBT,heivi/fMBT,mlq/fMBT,giantpinkwalrus/fMBT,pombreda/fMBT,yoonkiss/fMBT,heivi/fMBT,rseymour/fMBT,mixu-/fMBT,01org/fMBT,mlq/fMBT,rseymour/fMBT,mlq/fMBT,pyykkis/fMBT,mlq/fMBT,giantpinkwalrus/fMBT,mlq/fMBT,mixu-/fMBT,CosminNiculae/fMBT,violep01/fMBT,pablovirolainen/fMBT,violep01/fMBT,pyykkis/fMBT,mixu-/fMBT,CosminNiculae/fMBT,acozzette/fMBT,pombreda/fMBT,acozzette/fMBT,yoonkiss/fMBT,pablovirolainen/fMBT,mixu-/fMBT,OMKR/fMBT