Compatibility patch for 1.15.1-f4

[krzychu124]

• [Meta] Compatibility path for 1.15.1-f4
• [New] Clear all TM:PE rules from selected node #692, #1668
• [Fixed] Timed Traffic Lights wait = 0 issues #1497, #1674
• [Updated] Minor changes to Timed Traffic Lights sensitivity slider #1670
• [Updated] Pedestrian zone roads have now lower priority when setting up high priority road #1653