Update bootstrap.min.css

Changed min-wdth of drop down menu too 100px
160px is too wide for when the template is in the smaller resolutions and has the user detail on the left, and it "falls off" the screen.
Update bootstrap.min.css

Reverted Changes
Update mpos.css

Add changes here instead as suggested.
Update mpos.css

Makes more sense to change this actually.
Merge pull request #1987 from SamuelNZ/patch-3

Update bootstrap.min.css