I can filter by non-executed flow nodes

AT:

• In the executed flownode filter modal, I can switch between creating a list of executed flow nodes and creating a list of flow nodes that have not been executed
• The filter preview is adjusted accordingly
• The filter list entry is adjusted accordingly
• The exclusion semantic is identical to the variable filter: An executedFlowNode filter with operator "not in" translates to "Executed Flow Node is neither Flownode1 nor Flownode2"