Fix for dual extruder from repetier

Fix for dual extruder from repetier, push it just in case
Replace custom char 7 - printer ready by bed

Due to lack of space on screen use special char for bed like on others
firmware like marlin, printer ready char is not used in english but
german so replace it.
Do not hide home commands after usage

Home command are hidden after usage so if launch X home, Y home is
hidden, also seem available even hidden as can be launched if nothing
looks selected - this is confusing and not convenient - remove hidden
filter to always show commands
Display second extruder in main screen on screen

Allow to display 2 extruders and bed temperature if 2 extruders, it use
new bed customized char