MountMan startup takes some time (~2 sec for Celeron 2.1GHz) - upon this time Krusader and MountMan interfaces are not refreshing - creating poor UX. Also switching of 'Show only removable devices' checkbox can be improved - fast clicking on this checkbox (like 5-10-15 times without waiting of interface update) forces MountMan to switch removable/non-removable devices view with increased CPU usage and without ability to stop this switching in any way except to wait or to close MountMan's window. My suggestion are: 1. Add spinner for MountMan startup - display not changeable elements of interface like table headers and below them - display spinner for devices loading. 2. Add spinner below table headers upon switching of 'Show only removable devices' checkbox and block switching until devices list fully loads.