Increase the capacity of "Last Action Shortcut" menu

[kerembaydogan]

Hi thanks for this great plugin.

I need one small improvement.

"Last Action Shortcut" menu is awesome but I think the plugin should at least list two or three last used actions.

In current implementation; if I am using two actions, one after another, I can never use the Last Action Shortcut.

Thanks

Btw: I can write the code and open a pull request if it is ok.