Reduce minimum size of the top level frame to let it be used on 1024 x 600 displays.
Reduce minimum size of the top level frame to let it be used on 1024 x 600 displays.

git-svn-id: 31cbfd89c62d6b8b302bb3be5c74ebef9d32ffd0@1229 01035d8c-6547-0410-b346-abe4f91aad63

tmiw/freedv-osx,tmiw/freedv-osx,tmiw/freedv-osx