Leave small gap to left of toolbar, fix path quoting in pencil.html

Sorry for the messy move of my work from main to scroll_download.

I should have retracted my pull request for master.

Now that it is in I have gone through the loops to rebase my work and tested the result.

I successfully did
make load
make start
and all tested out well.

The detailed message below still holds, the other commits are just a little embarrassment I have to endure. (I didn't want to squash and beautify history).

Leave small gap to left of toolbar, fix path quoting in pencil.html
Force 4em gap on the left of toolbar for first line of file or first
entry in filelist to be visible.
Double-quote Scout.socket path argument so that file names including
single-quotes become useable (currently causes file to be inaccessible
after creation).