MythCenter: Display channum in channelrecpriority; Fix managerecrules spacing

Fix a typo that prevented channel numbers from being displayed in "Channel
Recording Priorities".
Fix line spacing in "Manage Recording Rules" programs buttonlist to
eliminate notice level log messages about height overflow.
MythCenter-wide: Display channel info in program_info & browse_info

Some of us don't bother to download channel icons, but we still like to know
what channel was used to capture a recording or the callsign of a channel
while browsing in Live TV. This patch provides the info, iff there is no
iconpath or coverart.
MythCenter-wide: Fix height overflow in Watch Recordings

Plus, other changes consistent with my MythCenter changes described in
http://code.mythtv.org/trac/ticket/11974
MythCenter-wide: Fix height overflow in schedule-ui.xml

Eliminate notice level logs about height overflow in the following screens:
viewscheduled (Scheduled Recordings),
channelrecpriority (Channel Recording Priorties),
programlist (Program Listings)
MythCenter-wide: Fix height overflow in base.xml

Eliminate notice level logs about height overflow in the following widgets:
basebuttonlist2, basetextedit.