issues table dataset:

- made more readable for assistance (added vorname, nachname, removed some fields)
- added default filters (all new, last 7 days...)
- issues displayed for children oes of permitted arrays as well
- query: more exact check for prestudents future status by using studiensemester start date
- typo fixes

public/js/issues/issuesDataset.js

@@ -17,7 +17,7 @@ var IssuesDataset = {
 			'<option value="new"> Neu </option>' +
 			'</select>' +
 			'<span class="input-group-btn">' +
-			'<button class="btn btn-default setStatus">Status für Ausgew&auml;lte setzen</button>' +
+			'<button class="btn btn-default setStatus">Status für Ausgew&auml;hlte setzen</button>' +
 			'</span>' +
 			'</div>';