Repository-browser resizable and scrollbars problems.

· Make the Repository-Browser resizable so the user can decide which is the size better for him.
· When the Repository-Browser was off the limits of the windows, there was no way to see it. The scroolbars were activated so where the user can scroll to see the Repository-Browser
Merge pull request #1 from najor/master

Make Repositoy-browser resizable and Scrollbars shows when Repository-Browser is off of limits.