SONAR-5575 Correctly send empty parameter values when modifying a custom rule
SONAR-5712 Merge package_design widget into file_design widget
SONAR-5606 Timeline chart does not behave correctly when measures don't have the same history
SONAR-5572 Improve the style of table headers in rule descriptions
SONAR-5570 Improve the hover effect of treemap blocks
SONAR-5575 Fix missing parameter when creating and updating custom rule with empty parameter
Fix merge with 4.5