[BUG] Save button placement

[jakeymac]

Describe the bug
The save button's placement in the modals for saving services in Tethys settings is awkwardly placed too far to the right.

[mattw-nws]

#container has a min-width of 980px in base.css...the main table on the app settings admin page behaves the same it's just more obvious what's going on because of the content. The JS popup may just need to start the window with a width of 980 instead of whatever it starts with now, which seems to be 800px. Having trouble identifying the event handler that actually does the popup because of a Chrome extension on my system... but it almost certainly is JS somewhere (e.g. window.open()), because the location bar is hidden in the popup.

[jakeymac]

Looks like this issue is fixed in Django 5, at least in version 5.1.1. The layout used in this popup comes from Django.

[swainn]

Since we are supporting Django 4, we should try to fix this for that version too. Should be a matter of tweaking some of the custom CSS for the admin pages.