Wanderer: adjust handling of volume icons
- when looking for icon to match a volume, first match offline volumes
by volume name
- set and clear OFFLINE and DISABLED state, previously it was only set
- update private flags when updating an icon entry
First change solves the following problem:
Have "AROS Live CD:" OFFLINE and CDO:BUSY ONLINE
When AROS Live CD goes online it is assigned to CD0: device and
previous code was matching it to icon entry representing CD0:BUSY.
git-svn-id: https://svn.aros.org/svn/aros/trunk/AROS@48156 fb15a70f-31f2-0310-bbcc-cdcc74a49acc