Fixed dwb startup issue

This solves the following issue:

    'GLib-GIO-Message: Using the 'memory' GSettings backend. Your settings will not be saved or shared with other applications.'

in the same way as in 413ebfb2469b394a4f4d48ba3567be3c68344722 and a8f6601fc63336eec82189b1568e4a47c6b67205.