News: OmsVme58 to check ZMX, SardanaMotorMenu.py: upgrade encoder widget

• OmsVme58 to check ZMX status (P23): added the attribute FlagCheckZMXActivated. If FlagCheckZMXActivated == 1: the OmsVme58 server checkes the Deactivation attribute of the related ZMX device (property ZMXDevice). See here.

  If FlagCheckZMXActivated == 0: no checks on the ZMX are executed.

• SardanaMotorMenu.py: encoder widget updated for a better closed-loop support, see here.

• SardanaMonitor: mesh scan, status ongoing.

• New Oms feature: MoveLoop, use case: fast mesh scans.

  MoveLoop:
  AA;LS10;MA0;GO;MA10000;GO;MR,5000;GO;LE;MA0;ID
  - Loop
  - X is moved to 0 then to 10000
  - Y is rel-moved by 5000
  - Loop end
  - X is moved to 0 after the loop expired
  - the DONE flag is set at the end
  

  Need to prepare a Python interface that can also be used from Macros.

  Status: first tests OK, further testing needed.