JBIDE-16649 : deactivate Profile Mgmt if the m2e one is installed

Rather than preventing m2e 1.5 from being installed with this version of the Maven Profile Manager,
we detect if the conflicted plugin is installed and hide the menus, icons and remove the key binding to Ctrl-Alt-P so both Managers can coexist without any conflict

Signed-off-by: Fred Bricon <fbricon@gmail.com>