Handle mounting error on `mount-all` command.

[roshanmaskey]

While mounting all containers using mount-all command, if mounting a container fails, Container Explorer errors out without mounting remaining containers.

There might be error on mounting one or two containers, which results in not mounting the remaining containers.

Proposed Solution

1. Skip the container that failed the mount operation and continue mounting the remaining containers.
2. Highlight the containers that failed mount operation.
3. Suggest debug command to mount the failed containers.