feat(theses): replaced text field with drop-down menu for field of study

theses.yaml

@@ -487,9 +487,39 @@
                 fallback-lang: de-de-formal
                 translations:
                   en-eu: "Is this a bachelor or a master thesis? And in which Field of Study are you enroled in?"
-              placeholder: "Bachelor"
               default: null
               optional: false
+              presets: 
+                - text: "bscInfo"
+                  label: 
+                    fallback: "Bachelor Informatik"
+                    fallback-lang: de-de-formal
+                    translations:
+                      en-eu: "Bachelor Informatics"
+                - text: "bscMedien"
+                  label: 
+                    fallback: "Bachelor Medieninformatik"
+                    fallback-lang: de-de-formal
+                    translations:
+                      en-eu: "Bachelor Mediainformatics"
+                - text: "mscInfo"
+                  label: 
+                    fallback: "Master Informatik"
+                    fallback-lang: de-de-formal
+                    translations:
+                      en-eu: "Master Informatics"
+                - text: "mscMedien"
+                  label: 
+                    fallback: "Master Medieninformatik"
+                    fallback-lang: de-de-formal
+                    translations:
+                      en-eu: "Master Mediainformatics"
+                - text: "mci"
+                  label: 
+                    fallback: " Master Mensch-Computer-Interaktion"
+                    fallback-lang: de-de-formal
+                    translations:
+                      en-eu: "Master “Mensch-Computer-Interaktion”"
         "anmeldetag": &anmeldetag-form-optional
           - "6": &anmeldetag-field-optional
               tag: day