Fix Mac (command key) and Win (slow init) failures

Author: krassowski

atest/05_Features/Jump.robot

@@ -19,12 +19,14 @@ Python Jumps between Files
 
 Ctrl Click And Jumping Back Works
     [Setup]    Prepare File for Editing    Python    editor    jump.py
+    Wait Until Fully Initialized
     ${usage} =    Set Variable    a_variable
     ${sel} =    Set Variable    xpath:(//span[contains(@class, 'cm-variable')][contains(text(), '${usage}')])[last()]
     Click Element    ${sel}
     ${original} =    Measure Cursor Position
     Capture Page Screenshot    01-ready-to-jump.png
-    Click Element    ${sel}    modifier=CTRL
+    ${key} =    Evaluate    'COMMAND' if platform.system() == 'Darwin' else 'CTRL'    platform
+    Click Element    ${sel}    modifier=${key}
     Capture Page Screenshot    02-jumped.png
     Wait Until Keyword Succeeds    10 x    1 s    Cursor Should Jump    ${original}
     ${new} =    Measure Cursor Position