Edit Package Page QoL changes

Hey, two demands for the edit package page :
keep the "Tags" field just below (or even above) the "Maintenance State" field (it saves me from scrolling when I mass edit tags)
add a save button at the top of the page (unless I can press a key for it?) (same reason)

it's not an emergency at all, I'm just doing some quick housekeeping right now

thanks!