BLOB with zlib compressed text

Hi!

It would be a nice feature if DB4S was able to interpret, preview, extract BLOB types with zlib compressed text in it.
Also if multiple cells are selected it could export all the selected cells.
Just two things I'd have needed a lot of times. :)
Please consider adding these features. Thanks!

Useful extra information

I'm opening this issue because:

• DB4S is crashing
• DB4S has a bug
• DB4S needs a feature
• DB4S has another problem

I'm using DB4S on:

• Windows: ( version: ___ )
• Linux: ( distro: ___ )
• Mac OS: ( version: ___ )
• Other: ___

I'm using DB4S version:

• 3.10.1
• 3.10.0
• 3.9.1
• Other: ___

I have also:

• Tried out the latest nightly version: https://github.com/sqlitebrowser/sqlitebrowser#nightly-builds
• Searched for an existing similar issue: https://github.com/sqlitebrowser/sqlitebrowser/issues?utf8=%E2%9C%93&q=is%3Aissue%20

The issue requests two separate features: interpreting, previewing, and extracting zlib-compressed BLOB text, plus exporting multiple selected cells. No files, tests, or entry points are named, so begin by locating DB4S's BLOB preview/extraction and cell-selection export paths. Done would require defined behavior and tests for both requests.