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/en-us.json

@@ -10,6 +10,7 @@
         "submit": "Submit",
         "send": "Send",
         "success": "Success",
+        "continue": "Continue",
         "error": "Error",
         "copy": "Copy",
         "copied": "Copied",