Warn users before batch edits

[keiranking]

Problem

When I'm about to edit multiple tracks,
I want to get a reminder of my impending action,
So I can minimize the chances of making a costly mistake.

Offering undo/revert functionality (#85) is not straightforward. In its absence, it's possible to make costly errors when editing tracks. For instance, mistakenly adding a keyword to several tracks, half of which already (correctly) had the keyword. Removing the keyword from these tracks afterwards would be just as inaccurate as leaving it.

Solution

• Warn users before submitting batch edits.
• Offer a setting to turn the warning on/off.
• Provide a way to change the setting from the warning itself.