The latest development build (dolphin-emu-master) had UI scaling issues similar to those described in this post. I'm using Zorin OS 15, but apparently this is a common issue to GNOME based UIs. In that post they were unable to find a solution, but I was able to solve it by editing ~/.profile and adding export QT_AUTO_SCREEN_SCALE_FACTOR=0
to the end of the file, now it works perfectly. I figured this was a Qt issue because the 5.0 doesn't have this issue nor does it use Qt, but I wanted the latest dev version because of ubershaders. I don't know if this is a Qt issue or a Dolphin one - I believe the latter because VirtualBox which also uses Qt always worked perfectly - but I figured it was important to bring this up so others can see this solution too.
to the end of the file, now it works perfectly. I figured this was a Qt issue because the 5.0 doesn't have this issue nor does it use Qt, but I wanted the latest dev version because of ubershaders. I don't know if this is a Qt issue or a Dolphin one - I believe the latter because VirtualBox which also uses Qt always worked perfectly - but I figured it was important to bring this up so others can see this solution too.