Improve the filenames for notes
Improve the filenames for notes

The filename of a note is generated from its title. We should avoid some
characters like ? to ensure that the filename is compatible with the
windows and macOS file systems, so that the file can be synchronized
with the desktop client safely.

nono/cozy-stack,nono/cozy-stack,nono/cozy-stack,nono/cozy-stack,nono/cozy-stack