Hi,
Missing fonts is generally a benign problem as we haven’t seen any issues with it. You can download those missing fonts and add them yourself.
Tab_Background.png issue was corrected in the epic/master (actually I was the one who sent a PR).
The issue you are having with the Editor, as per the image you posted, has already been answered here on the AH:
Lastly, I suggest running our community branch available in my repo at 3dluvr/4.7-linux, as it contains fixes which greatly improve the experience that are not available in epic/4.7
Once 4.8 is released that won’t be necessary, but for the time being, for Linux, 3dluvr/4.7-linux is the best bet.