PCrudFilterPane can generate illegal queries

[Pasi Kallinen]

When using some of the negating filters, such as "not like" or "not between", PCrudFilterPane can generate illegal queries with "undefined" values.

Fix in http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/paxed/pcrudfilterpane-fix

[Pasi Kallinen (paxed)]

Branch updated with another small fix, so the user-input text is remembered when changing operators.

[Mike Rylander (mrylander)]

Can the second fix get us into trouble when the value from the old widget doesn't make sense for the new operator?

[Pasi Kallinen (paxed)]

It checks the type of the input widget, and changing the field on which it operates clears the value. I haven't seen it break yet, but that proves nothing...

[Lebbeous Fogle-Weekley (lebbeous)]

Tested and works well. Pushed to master and rel_2_4. rel_2_3 has some differences preventing clean application of the patch, and those differences might even be such that the bug can't be reproduced in a 2.3.x release. Leaving rel_2_3 alone until/unless somebody reports a problem there.