Fixes

• Arrington eye-tracker element caused experiment abortions after a calibration procedure has been used
• The bug report window gets blocked after a communication error
• HTTP  Error: 417 "Expectation Failed” on submitting a bug report on some computers
• Cut-copy operations in the code editor causing a crash

Changes

• SMI tracker element is made capable to be asynchronously triggered by incoming SMI event. Event content can be read via a dedicated property
• Experiment is not aborted automatically anymore, when  the top flow ends (e.g  when the duration of a root event is expired). As a result, the default  experiment consisting of a single event on the top layer will be active, until Esc button is pressed. This change removes a necessity to add a blocking event on the root layer in most of the multi-layer scenarios