Fix quality flaws
Revert Rename PropertyDefinitions to PropertyDefs and PropertyFieldDefinition to PropertyFieldDef
SONAR-3340 Fix UTs after adding id on duplications_index
Revert Rename PropertyDefinitions to PropertyDefs
SONAR-3893 Remove highlighting when clicking on an already highlighted symbol occurrence
SONAR-3893 Fixed inconsistent display on issues
Rename PropertyDefinition#subcategory() to subCategory()
SONAR-3755 Fix bug when displaying issues widget
SONAR-4252 update favicon