Cleaning up fonts in default.pptx, shrinking default.pdf

Updated release to 2.3.0-beta-2

Fixes: 278223b4 ("Recover 2.3-alpha3 version of bbb-conf")
Resolves: https://github.com/bigbluebutton/bigbluebutton/issues/11035

Fixes  #11418
The `connectionStatus` property was removed from the Users collection in 2.3, so the check was always returning 0 which means the cron job could potentially restart KMS and SFU while there were still active users.

there was a call of grep which failed when the config file does not
exist yet. check existance of file first.

operators can define their own config for bbb-web which will not be
overwritten by packages.

bbb-conf is changed accordingly to write configuration values to
``/etc/bigbluebutton/bbb-web.properties`

operators can define their own config for bbb-web which will not be
overwritten by packages.

bbb-conf is changed accordingly to write configuration values to
``/etc/bigbluebutton/bbb-web.properties`

This change introduces a config file
`/etc/bigbluebutton/bbb-fsesl-akka.conf` which reads the default config
from packages and allows operators to keep their own config file changes
across package upgrades.

bbb-conf is adjusted to deal with this change.

config files from packages should not be changed unless they reside in
/etc

Most of the changes date back to #10700 
We were trying to trace down a problematic change likely when merging 2.2.31 into 2.3 ( #11033 )
If anyone spots issues with bbb-conf on their 2.3 server, please comment

Change http:// to https://

fixed typo

Empty After= may confuses systemd

This patch fixes a typo in bbb-record causing problems by checking the
bigbluebtuuon user.