Scrollbar clutters :oldfiles

[mawkler]

First of all, I just wanna say that this little plugin is awesome!

Anyway, after trying this plugin out for a while and running :oldfiles I see a lot of ~/scrollbar_x files where x is a digit.

I also noticed that other plugins that show me recently used files seem to have been cleared of most of my files.

[Xuyuanp]

I just pushed a fix.
Only one scrollbar-buffer will be created for each buffer. You still will see scrollbar_0 and scrollbar_1, but maybe not too much. It determined by the number of buffers you open in a single session.