merge master

docs/custom-texts.md

package-lock.json

package.json

src/app/config/custom-texts.json

src/app/config/custom-texts.md

src/app/shared/alert/alert.component.html

src/app/shared/alert/alert.component.ts

src/app/shared/alert/alert.css

src/app/shared/alert/alert.module.ts

src/app/test-controller/unithost/unithost.component.html

src/app/test-controller/unithost/unithost.component.ts

src/app/workspace-admin/backend.service.ts

src/app/workspace-admin/files/files.component.css

src/app/workspace-admin/files/files.component.html

src/app/workspace-admin/files/files.component.ts

src/app/workspace-admin/files/iqb-files/iqb-files.module.ts

src/app/workspace-admin/files/iqb-files/iqb-files.scss

...es/iqb-files/iqbFilesUpload/iqbFilesUpload.component.html

...iles/iqb-files/iqbFilesUpload/iqbFilesUpload.component.ts

...qbFilesUploadInputFor/iqbFilesUploadInputFor.directive.ts