ORA-5.2.6

#1566 Missing refresh
#1565 Undefined "turn RGB LED on colour" block
#1513 Error in Notification Controller
#1570 AltGr does not work in Windows when a blockly field is edited
#1571 Update getting started documentation
#1539 Add a simulation for Edison
#1414 Move for and to block should stop when the Robotino is colliding (Simulation)
#1425 Improve the visualization of obstacles
#1486 Deactivation NEPO-Block causes error
#1551 Robotino config fails validation after import
#1540 Inconsistency between code view and compilation
#1577 compiler version check missing in README.md