Improve french translation

Signed-off-by: pieterg <pieterg@users.sourceforge.net>
GetEcmInfo: Avoid that ecm has the value None

As this could lead to a GSOD in the Softcam Manager
http://openpli.org/forums/topic/33587-gsod-when-i-go-to-the-softcamsetup/page-2
Only clear CAID cache when it is filled with the fake CAID 0000

Hopefully this will improve the crypto icon behavior in the channel lists
Standby: do not timeout to deepstandby when a tuner is in use

This avoids that the box goes to deepstandby when via remote stream a
tuner is still in use.
Standby: for now I poll each 10 minutes for a tuner in use

As between zapping we get a status tuner mask 0 so the client box was not
able to zap. Still I have to think for a better solution.
Merge branch 'master' of git://git.code.sf.net/p/openpli/enigma2