jf_activity: paginated list in ui

added POST route for pagination to activity route, a count route, and
modified Search and PaginatedList a bit to support lists without search
fields (essentially just running an empty search). Visible by clicking
on a user's name in the accounts tab.

lang/common/en-us.json

@@ -46,7 +46,12 @@
         "inviteRemainingUses": "Remaining uses",
         "internal": "Internal",
         "external": "External",
-        "failed": "Failed"
+        "failed": "Failed",
+        "details": "Details",
+        "type": "Type",
+        "other": "Other",
+        "back": "Back",
+        "none": "None"
     },
     "notifications": {
         "errorLoginBlank": "The username and/or password were left blank.",