Summary:
The selection reticle in Pholio is functional but not very pretty right now. Make it look a little nicer.
- Using `box-sizing: border-box;` allows us to get rid of the `x - 1` and `y - 2` stuff.
- I draw the reticle with two elements: one mostly-transparent which creates a fill, and one fully opaque to create a strong dashed border.
Test Plan: {F31803}
Reviewers: ljalonen, chad
Reviewed By: chad
CC: aran, kchr
Differential Revision: https://secure.phabricator.com/D4836
4004621d76