Add support for hiding double-byte colon

I just installed this module in a new site I am working on, and it works great, with one little glitch, though. The website in question is in Japanese, and I noticed that the trailing colons in the labels are not hidden. This is because Japanese uses double-byte characters, so the colon character code is different. Adding the following bit underneath line 37 in compact_forms.js did the trick for me:

lbl = lbl.replace(/：/,' ');

Now, I am not a programmer, so it may well be possible that my solution is a aberration and that there is a more elegant/appropriate way to fix this. But I thought I would share it anyway, in case you want to add this (or a better) solution to your module.

Thanks!