Add support for coloured nested folders in sidebar

[tankgirl2810]

First time pull requesting. This is a minor change tthat allows for coloured nested folders.
Changes are:

• Updating the data-path^ to data-path*.
• Updating the .nav-folder-title to include .nav-folder .navfolder-title

For my own personal use as I have my everyday folder with nested folders and then other folders for work and PhD I wanted to have colouring on the primary folders and secondary folders in those groupings.

Please note my obsidian is still new just transporting my notes over from onenote and other applications at the moment:

[Zapperz0398]

Just tested this and there seems to be a bug

So there is a bug where the support for the nested folders only extends to a certain number of nested folders. This means, that only nested folders x levels deep support different colours to be added to the folders. After that, it just inherits the previous folders color, even by specifying a prefix:

[debasish-dutta]

But shouldn't the prefix on the nested folders be like 11, 12 for the 1st level and such? It would seem so much better then restarted the prefixes inside the folders.