Replace Zoom buttons with a simple list of options
Old busted
The current set of linked buttons to change the size of icons in Files has a few flaws:
- it doesn't show the extent or very limited range of the zoom levels
- this pattern is more familiar as overall zoom and text size doesn't change so it is misleading here
- the middle button isn't intuitive as it both shows the current level and resets to a unknown default
- switching from the smallest size to the largest takes several steps as the popover closes each time
- the percentage label "133%" etc. doesn't have a clear meaning
New hotness
Since we only have 4 levels of "zoom", we could replace the buttons with a simple list for icon size options. This solves all of the issues above since you can see all your icons size options and quickly switch between them.