Support url hostile characters in folder paths

[James Rae]

When browsing through the folder tree, if a folder has a character that is special to urls ( # for certain, probably ? & = as well), the navigation url will not escape the character and the browser mis-interprets it. You cannot navigate forward unless you hand-craft the url with the naughty character escaped.

These characters would mostly get introduced via a branch name.

Attempt to enhance the codebase to catch these characters and escape them (like, in a %AB format)