Tweaks for 1.02

This should have all the media tweaks we had going back and forth on the site .. I hope, so that things are working better on the very small screens.

It also disables the D&D area for screens below 540px which then just displays the standard select file box with more attachments and clear attachments old skool style.

@eurich I added in the poster name fix you had in the PR you closed.  I'm hoping that was due to the JS fix I'm proposing for the D&D area, since the JS was fighting with the css media queries.

@emanuele45 yes this does have the avatar change you posted, hope that does not cause a merge conflict.  Oh sorry about the merge branch in here :angel: