Merge pull request #2 from BlueRaja/CantClickOnEmptyBox

Cant click on empty edit box
Better fix for editbox height

Explicitly setting the height doesn't actually have an effect when it's a ScrollChild, so just use an additional overlay button to help with focusing on click
Merge pull request #1 from BlueRaja/EmptyWhitelistFiltersEverything

Empty whitelist results in *everything* being filtered out
Added a checkbox to choose whether to whitelist only trade-channel or all numbered channels