Merge branch 'master' into bis-773-export-fixes

.../generic/imagingapi/v3/dto/ImagingDataSetMultiExport.java

.../ethz/sis/openbis/generic/sharedapi/v3/ToStringCheck.java

...penbis-python3-pybis/src/python/tests/jenkinstest/test.py

app-openbis-installer/resource/installer/userInputSpec.xml

app-openbis-installer/resource/tarball/console.properties

...d/openbis/installer/izpack/GlobalInstallationContext.java

core-plugin-openbis/clients.gradle

...ugins/eln-lims-template-types/1/as/core-plugin.properties

...ns/eln-lims-template-types/1/as/initialize-master-data.py

...s-template-types/1/as/master-data/eln-types-template.xlsx

...e-types/1/as/master-data/scripts/date_range_validation.py

...ing-test-data/1/as/master-data/nanonis_example/imaging.py

...data/1/as/master-data/nanonis_example/nanonis_importer.py

...g-dataset-interceptor/lib/imaging-dataset-interceptor.jar

...ng/1/dss/services/imaging/lib/openBIS-premise-imaging.jar

...is/generic/server/dss/plugins/imaging/ImagingService.java

core-plugin-openbis/query-api.gradle

core-plugin-openbis/screening-api.gradle

...tion/client-side-extensions/eln-lims-web-ui-extensions.md

...loper-documentation/server-side-extensions/dss-imaging.md