Add show all button to return users from search results.

Resolves #270 and 291
Shows the show all button after other sorts.

On under review. Final resolve for #270
Dark icon was too dark, trying light

To resolve #289
Resolves typo of #293
Setting up functions to delete all alerts

For #281
Setting up to handle the delete all alerts JS
Handler to complete all-alert deletion.

Resolves #281
Better filtering of the alert box
Alert box now takes translit and filters

Should combine some of these into less filters in the future.
settings response prepped for translation
Updates for translation files.
Another version of the translation file.

I’m really not entirely clear how this is supposed to work, I hope I’m
doing it right.
Version uptick to 3.1.3
Merge branch 'master' into 3.1.x

Conflicts:
pressforward.php
Merge of master into 3.1.x to prep for release.
Merge pull request #295 from PressForward/3.1.x

Merge for the last bugfixes of 3.1.x