Ender 3 (Pro) Screen Cover

I noticed some people in the comments were having issues with the fit of [LegionOfTheRepublic's_Ender 3 Screen Cover](https://www.thingiverse.com/thing:3685571) so I decided to make it 1 mm wider and longer. While I was doing this, I made the grab handle a little larger and have less bridging. Their version printed fine and even fit well on my Ender 3 Pro but I have large thumbs and was having trouble getting a good grasp on the cover.