Message and activity admin_menu hook priority

[petronic]

Functions:
messages_check_installed()
bp_activity_check_installed()

are called by the hook:
add_action( 'admin_menu', 'bp_activity_check_installed', 2 );

In all other components priority for admin_menu hook for check_install functions is default, not 2.

Can you change priority to default for these two components also? It's hard to hook in here when checks are done at different time.

Patch attached.

Thanks!

[apeatling]

(In [2105]) Fixes #1323 props petronic