FR: for updates, show the currently installed package version, not only the new version (also a couple column usability notes)

[kn00tcn]

either change the columns so it's '...package / new ver / old ver / arch...', or prepend some text at the top of the package update information tab's text area (above the changelog, even if it says 'no update information is available')

i also dont understand why 'ver' & 'repo' in particular are shortened, their column width & content are never so short to not be able to fit the entire words 'version' & 'repository' into the column heading

now that i think about it, shouldnt the size column be put before summary? should the user be able to reorder columns (if draggable is too complex, maybe some config file)?