group-view: add %started update

pkg/arvo/app/group-view.hoon

@@ -193,6 +193,11 @@
       (~(put by joining) rid [%.n now.bowl ship %start])
     =.  jn-core
       (jn-abed rid)
+    =.  jn-core
+      %-  emit
+      %+  fact:io
+        group-view-update+!>([%started rid (~(got by joining) rid)])
+      ~[/all]
     ?<  ~|("already joined {<rid>}" (has-joined rid)) 
     =.  jn-core
       %-  emit

pkg/arvo/lib/group-view.hoon

@@ -54,9 +54,17 @@
     ?-  -.upd
       %initial  (initial +.upd)
       %progress  (progress +.upd)
+      %started   (started +.upd)
       %hide      s+(enjs-path:resource +.upd)
     ==
   ::
+  ++  started
+    |=  [rid=resource req=^request]
+    %-  pairs
+    :~  resource+s+(enjs-path:resource rid)
+        request+(request req)
+    ==
+  ::
   ++  progress
     |=  [rid=resource prog=^progress]
     %-  pairs

pkg/arvo/sur/group-view.hoon

@@ -31,6 +31,7 @@
 ::
 +$  update
   $%  [%initial initial=(map resource request)]
+      [%started =resource =request]
       [%progress =resource =progress]
       [%hide =resource]
   ==