Allow sizes to be adjusted down to the Tenth decimal for pixel perfect sizing.

[hianick]

Is your feature request related to a problem? Please describe.
I'm sure most people are aware of wow's ui scaling issues with weakauras, or the editbox border in this case, or really anything you want to make pixel perfect. Very often changing the size of something from 1-2 won't adjust it's thickness from 1px to 2px. Instead, this will often produce an ugly, lopsided appearance like this https://imgur.com/a/HQQG6xe (chat editbox border is 1px on top/left and 2px on bottom/right).

Describe the solution you'd like
Reduce the step size for various options from 1 to 0.1 so we can adjust the sizes down to the tenth decimal. The big step would still be at 1, so it's easy to resize by dragging the bar for someone who prefers that.

Additional context
By changing the step to 0.1 in the editbox.lua file I can adjust my editbox's border to 1.6 (the value I've found to have a perfect 2px width for any weakaura/plater mod I want to be pixel perfect on my 1440p monitor) in order to produce this https://imgur.com/a/7dSXcEK (2px border all around).