Hard-coded the size of the icons in the toolbar to temporarily fix the shift...

Hard-coded the size of the icons in the toolbar to temporarily fix the shift in size when switching between views until docked widgets are implemented. Fixes #5084.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/branches/ipce@7970 41f8697f-d340-4b68-9986-7bafba869bb8