- Enable cached results when checking if the user is an admin. Cached results
are only invalid when a user newly get admin permission or when an existing
user loose admin permission. Here the consequence of showing wrong results is
minor.
- Use all small case for variable names.
- When we use a utility method from Plinth, we can trust it to give expected
values. Otherwise, we should fix the method to be more robust.
- Don't recommend the user to go to disks configuration page as there is not
much there to do to free up space. The action might be removing apps, deleting
downloaded content (downloaded via torrents) etc.
- df is unlikely to return '-1' for size of disk.
- Avoid using -1 as error value.
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
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