Usability improvement type search

See merge request sharing/codeability-sharing-platform!51

Resolve "Umstellung Connector Plugin auf V0.1.2"

See merge request sharing/codeability-sharing-platform!49

127-make-page-length-in-searchinputdto-configurable

Conflicts:
	src/main/java/at/ac/uibk/gitsearch/web/rest/PluginInterfaceResource.java

136-umstellung-connectior-plugin-auf-v0-1-2 (part 1)

Conflicts:
	pom.xml
	src/main/java/at/ac/uibk/gitsearch/service/dto/SearchInputMetadataDTO.java
	src/main/resources/config/application-dev.yml
	src/main/resources/config/application-prod.yml
	src/main/resources/config/application-staging.yml
	src/test/resources/config/application.yml

Resolve "Minor Problems with Bookmarklists"

See merge request sharing/codeability-sharing-platform!46

# Conflicts:
#   src/main/webapp/app/bookmarks/bookmarks.component.scss
#   src/main/webapp/app/bookmarks/bookmarks.component.ts