notifications: tests: clear existing notifications before testing to avoid test failures

This can be relevant if other components have created notifications before running the notifications tests.

(integrated from komodo (trunk) change 81200 by marky)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13354 b87d16e7-d29f-4ee1-b5ec-817d645d335f
skins: force set custom scrollbars pref on startup

This makes sure we use the right settings for people with older profiles before Abyss had the pref.

(integrated from komodo (trunk) change 81201 by marky)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13355 b87d16e7-d29f-4ee1-b5ec-817d645d335f
scintilla: pass in the mouseup event when opening context menus.

This sets <menupopup>.triggerNode.

(integrated from komodo (trunk) change 81202 by marky)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13356 b87d16e7-d29f-4ee1-b5ec-817d645d335f