admin: add manual "Send Password reset" to accounts tab

Only appears with Reset links enabled.
Pressing this sends a PWR link to the users selected.
if one user is selected, or if one of you selected users doesn't have a
method of contact, a link is given to the admin to send to them
manually.

lang/common/de-de.json

@@ -9,6 +9,7 @@
         "emailAddress": "E-Mail-Adresse",
         "submit": "Absenden",
         "success": "Erfolgreich",
+        "continue": "Weiter",
         "error": "Fehler",
         "copy": "Kopieren",
         "theme": "Thema",