"Unlock under mouse"

Basically this would unlock all things "under" the mouse when you right click. This would save a ton of time since you wouldn't have to unlock EVERYTHING, just to change one little thing about something, then have to go around locking EVERYTHING again.

Are you talking about the level editor or the event editor? I don't really get what you mean, but you can select multiple sprites in the level editor by shift+left mouse clicking. You can also unselect stuff exactly the same way.

You might be confusing something or you haven't noticed the shift modifier.

Edit: Oh, right, you must've meant the actual sprite locking. My bad.

Edit 2: Okay yeah that's exactly what you meant, makes for a nasty problem. I didn't find a way around it either now that I looked into it.

Edit 3: Well, you could try arranging your stuff in layers and lock the layer instead, I'd expect it to be quite useful but then again I don't know what you're doing.

I actually went through and organized everything into layers last night, to achieve what you said in edit 3, heh. Great minds think alike amirite?