add semester filter for tags

- in detailheader: use currentSem for manual triggering and refactor formatter
- in list: preload list of ids with start and end for tabulator formatter to enable filtering

public/js/api/factory/stv/tag.js

@@ -61,6 +61,21 @@ export default {
 		};
 	},
 
+	getSemDates(studiensemester_kurzbz){
+		return {
+			method: 'get',
+			url: 'api/frontend/v1/stv/Tags/getSemDates',
+			params: studiensemester_kurzbz
+		};
+	},
+
+	getAllStartAndEndAutomatedTags(){
+		return {
+			method: 'get',
+			url: 'api/frontend/v1/stv/Tags/getAllStartAndEndAutomatedTags',
+		};
+	},
+
 	rebuildTagsforTypeId(data){
 		return {
 			method: 'post',