Removed "USS Navigation" from side menu bar, Updated menu maintenance(removed the maintenance for 1st level admin navigation)
Fixed navigation bug
#Bug 3630 - UPASS Admin - Menu Maintenance (Update)
#Bug 3630 - UPASS Admin - Menu Maintenance
#Bug 3615 - M2U UPASS - Menu Maintenace
Forked from agro-admin r:642, stripped away as much classes as it still compiles, but still dependent on agro-core, thus WIP...