Description:
When opening files sent by email (thunderbird), LibreOffice silently allows saving of changes in /tmp. This is dangerous, as one can think that a file has been safely saved, but then it can be automatically deleted later when /tmp is cleaned out.

Instead, when saving changes to a file in /tmp, LibreOffice should place a warning banner at the top of the document, or perhaps show users a dialog box that forces them to acknowledge that the file is not being saved in a 'safe' location.

My experience is with Linux, but perhaps it is similar on Windows also. This was with Thunderbird 91.5.0 on Ubuntu 18.04, and LO 7.2.5.2.

Steps to Reproduce:
1. open email in Thunderbird
2. click to open .docx attachment (in my case)
3. type something into the doc, then type ctrl-S to save

Actual Results:
No warning. File is silently saved (after confirming Microsoft file format in my case).

Expected Results:
I would expect some visual alert to mention that I am saving my file in a temporary folder, which is likely to be periodically emptied. Changes by end users should normally be savings in a non-temp folder.


Reproducible: Always


User Profile Reset: No



Additional Info:
This new warning should have a configuration setting to allow it to be disabled, for users who have some clear need to save files in /tmp. Alternately, the warning could be disabled on a per-file basis via a command-line switch when first opening the file in question...?