Adapt position and name of licenses in Metadata Panel and implement their links

Table of image licences:
https://intranet.sub.uni-goettingen.de/display/prjGFL/How+to+display+metadata#Howtodisplaymetadata-Permissionsforpublication

Table of archives abbreviations:
https://intranet.sub.uni-goettingen.de/display/prjGFL/How+to+display+metadata#Howtodisplaymetadata-Archiveabbreviationstable

Image licenses refer to the "Digitalisate".

Acceptance criteria:

• Name/ heading should be: "Lizenz des Digitalisats"
• Show license on page level:
• implement links to the license text

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Kennzeichnung
1 : 63r
Lizenz des Digitalisats
CC-BY-NC-SA-4.0 [links to actual license text]
Sprache [...]

• They can be specified in the TextAPI at the respective item inside the image object. (Sie können dann in der TextAPI beim jeweiligen Item im Image Object angegeben werden.)