Large block lists causes browser to close. Exit. Gone. Nada.

[Blake GH]

Tested on 3.1 and 3.3. Block list size: 36MB and ~2 million entries.

Reproduce:
1. Create a large block list file on the server.
2. Login to the staff client and browse to the offline interface.
3. Download the block list.
4. Wait 5 minutes for the download to finish.
5. Logout.
6. Navigate back to the offline interface.
7. Wait 10 seconds.
8. The browser closes itself.

This is related to bug 1727557 but different enough, I felt it needed it's own bug. Instead of the browser becoming unresponsive during the download, it closes after a perfectly complete download.

For now this hack to the cronjob fixes it:

. ~/.bashrc && $EG_BIN_DIR/offline-blocked-list.pl $SRF_CORE > $OPENILS/var/web/standalone/list.txt && head -n 100000 > $OPENILS/var/web/standalone/list2.txt && mv $OPENILS/var/web/standalone/list2.txt $OPENILS/var/web/standalone/list.txt

Of course, it's not a complete block list and basically destroys the premise of a block list.

If the browser storage cannot handle such a dataset then what alternatives do we have? Hatch?