Bug fix point release

This is an IMPORTANT upgrade, it fixes 3 nasty bugs:

• The long standing "too many open files" issue, that has been with us since version 0.27.0! (#446)
• Fixed a bug that caused the scanner to "hang" in certain circumstances.
• When changing user details, the password would be overridden with garbage, preventing the user to login again (#1222)

Also, please read the release notes from 0.44.0 if you haven't already done so.

Changelog

fb183e58 Only encrypts NewPassword if it is not empty, when updating the user details. Fixes #1222 ed286c71 Don't rely on goroutines to send keepalive events 452c8dc4 Fixed the enduring nasty "too many files open" bug!! Fix #446 0c2ca2a5 Assign event ids in the main loop, to avoid out-of-order events 5bd33455 Fix deadlock situation when events are sent too fast to the broker 4ea0f235 Fix scrollbar colour for Dark/ExtraDark theme. Fixes #1216