qm: add a bit of padding, fix alignment. 

3px padding to the form fields for quick message make it much more inviting.
The select element was also out of alignment, this is no longer the case.
Merge pull request #1878 from creesch/patch-1

qm: add a bit of padding, fix alignment.
Cleanup previous css.

apologies for the sloppy work I did.
Merge pull request #1879 from creesch/patch-1

Cleanup previous css.
remove quickmessage default subject

fixes #1874
also add RESUtils.bodyClasses to body, not just html

hope this doesn't completely kill @honestbleeps' efficiency win from 2f8c80b4c3459