SSDM-10196 Fixed not correct string comparison using '<', '<=', '>', '>=', now string is always converted to lowercase. Made the query to search by controlled vocabulary, by sample or material property more robust against null values in the WHERE SQL statement.

SSDM-10215 : openBIS core : vocabularies : allow deletion of all vocabulary terms (i.e. making a vocabulary empty)

NG_UI : types : SSDM-10193 - tests for adding new properties (local, global and global existing) + fix a bug where existing global properties had vocabularyType, materialType and sampleType editable

SSDM-10226 Refactored SampleContainerSearchManager so that it does not extend AbstractCompositeEntitySearchManager.

SSDM-10226 Made the implementation of search with parents and search with containers more efficient.

SSDM-10191: moving some constants around in order to fix dependency checking when compiled with JDK 11

SSDM-10191: fixing Java 11 module visibility problem for parsing xml via jython (important in microscopy)

SSDM-10151 Added extra parentheses to the "IS NOT NULL" checks because in certain cases the conditions may fail when there boolean "OR" afterwards.

NG_UI : types : SSDM-10193 - add tests for internal property types/assignments and system internal property types/assignments