MythThemeBase: fix some formatting
ChannelRecPriority: fix the missing channel icon in the details
Add missing spaces in HouseKeeper log messages.

Pointed out at https://forum.mythtv.org/viewtopic.php?p=2641#p2641
Copy m_added and m_created in the MythNotificationScreen copy operator instead of initialising them to false. May fix some reported issues with performance during playback and duplicate popups.
Frontend Network Control: add some theme related commands

Add commands to reload the theme, toggle showing widget borders and toggle
showing widget names. The commands just call the relevant jump points so they
must be defined for the commands to work.

The commands are:

theme reload       - Reload the theme
theme showborders  - Toggle showing widget borders
theme shownames    - Toggle showing widget names
MythZoneMinder: don't try to connect to the mythzmserver if non is defined

If the server IP setting is empty or the port is -1 then we will never try
to connect to the server.
MythZoneMinder: make sure the AlarmNotifyThread only tries to run if connected
Move the warning about using LIMIT and OFFSET with LoadFromProgram() to where they should be.
WebFrontend: Change colour of airdate and subtitle to differentiate
them from the surrounding text.

I'm not sure it's the right colour. It's difficult to find the correct balance
between sufficient contrast and a good colour balance.

It will do for now.