Warn when navigating away from unsaved editors

[Throne3d]

It would be nice if clicking the "add alias" button while editing a character did at least one of the following:

• automatically saved changes to the character
• asked if you wanted to save changes to the character
• alerted you that you would lose unsaved changes to the character
• gave you a pop-up / new text entry field, instead of loading a new page

I keep editing a character, putting new things in several text fields, and getting down to the "add alias" button and hitting that and then realizing that it loads a new page and grumbling at my brain.

-Moriwen

(More generally this should probably be added to a variety of forms, but only appear when the content has been modified from default.)

Locations:

• [ ] characters#edit
• [ ] galleries#index when you've selected some icons in the checkboxes (so you don't accidentally click an icon and move away)
• [ ] replies#new so you don't click away and leave your post

[Marri]

Follow up with a link to character pages from the editor, since accidental clicks won't lose anything.

[Marri]

@Throne3d didn't you add this?

[Throne3d]

I don't think so – I did do something like warning when moving away from editors, iirc, but not this. (I can't recall what I did do though…)