Add config options for adjusting the list width of projects and mru of hyper theme

[huibosa]

Comparing the following two snapshots:

It seems to me that the second one with a wider mru list is more coordinated.

For now, the width of the mru list is determined by the longest path string, so is it possible to:

1. Add config option for setting the list width.
2. Or add config option to set the "padding" between the last character of path string and the shortcut key character, instead of a fixed space character
3. Other options making the list width equals the weekend title, which would be nice