PLF-5974: Cannot start PLF with MySQL in UTF-8 (ecms)

Fix description:
- Add dialect to repository configuration
ECMS-6256: Incorrect sort by title using categoryList template in content list portlet

Fix description:
- In case of sorting taxonomy, use exo:name as sort creteria instead of exo:titlePublished
ECMS-6312: [Product] Redundant bullets in Document View

Fix description:
- Restore style of nav-tabs element to avoid regression
ECMS-6234 PropertyValueComparator class is duplicated in core service and in webui
Fix description: re-add PropertyValueComparator in core webui to use in platform.
Merge commit 'd8c3385221ba0c5a757966a1dc4469fdc0430893' into HEAD