angular: don't use link pointer on inactive buttons

[Andrea Neiman]

3.8, probably other versions.

Minor usability issue:

In several (all?) of the newer Angular interfaces, the mouse pointer will change to the link pointer (finger pointer) when it hovers over any button, even if that button is inactive. This could lead users to erroneously think the inactive button is clickable.

In contrast, the older AngularJS interfaces would change the mouse cursor to a "no" / prohibition symbol when mousing over an inactive button.

Ideally, the link pointer will only show when hovering over an active clickable button.

[Stephanie Leary (stephanieleary)]

Patch adding a not-allowed cursor style for inactive buttons: https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/sleary/btn_disabled

[Terran McCanna (tmccanna)]

I like it, works great! My sign off is at:

https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/mccanna/btn_disabled_signoff

[Jane Sandberg (sandbergja)]

Pushed to rel_3_9 and above. Thanks, Stephanie and Terran!