Mod portal: Discussion improvements

[Mylon]

The discussion tab is nifty, but I'd like some changes to the interface.

The default chat input box is far too small. I can click-drag to expand it, but if I drag it to the right, the box can be bigger than the display element with no scroll bar and it becomes very difficult to continue writing. Making the default size larger and allowing it to extend beyond its parent element would be appreciated.

I also thought information might be preserved if I click another tab but it lost my partially written post. The portal should ask to confirm if the user tries to navigate away without having submitted their post.