dashboard/app: fix patched/missing on numbers

We currently print N/M which does not mean N out of M are patched,
instead it means N patched and M are not patched.
This is confusing. Print more traditional "N out of M".

dashboard/app/main.go

@@ -93,6 +93,7 @@ type uiBug struct {
 	Commits        string
 	PatchedOn      []string
 	MissingOn      []string
+	NumManagers    int
 }
 
 type uiCrash struct {
@@ -389,7 +390,7 @@ func createUIBug(c context.Context, bug *Bug, state *ReportingState, managers []
 		Status:         status,
 		Link:           bugLink(id),
 		ExternalLink:   link,
-		PatchedOn:      bug.PatchedOn,
+		NumManagers:    len(managers),
 	}
 	if len(bug.Commits) != 0 {
 		uiBug.Commits = fmt.Sprintf("%q", bug.Commits)
@@ -401,10 +402,13 @@ func createUIBug(c context.Context, bug *Bug, state *ReportingState, managers []
 					break
 				}
 			}
-			if !found {
+			if found {
+				uiBug.PatchedOn = append(uiBug.PatchedOn, mgr)
+			} else {
 				uiBug.MissingOn = append(uiBug.MissingOn, mgr)
 			}
 		}
+		sort.Strings(uiBug.PatchedOn)
 		sort.Strings(uiBug.MissingOn)
 	}
 	return uiBug

dashboard/app/templates.html

@@ -25,7 +25,7 @@ Use of this source code is governed by Apache 2 LICENSE that can be found in the
 			<td class="stat {{if $b.NumCrashesBad}}bad{{end}}">{{$b.NumCrashes}}</td>
 			<td class="stat">{{formatReproLevel $b.ReproLevel}}</td>
 			<td class="stat">{{formatLateness $.Now $b.LastTime}}</td>
-			<td class="patched" title="{{$b.Commits}}">{{if $b.Commits}}{{len $b.PatchedOn}}/{{len $b.MissingOn}}{{end}}</td>
+			<td class="patched" title="{{$b.Commits}}">{{if $b.Commits}}{{len $b.PatchedOn}}/{{$b.NumManagers}}{{end}}</td>
 			<td class="status">{{if $b.ExternalLink}}<a href="{{$b.ExternalLink}}">{{$b.Status}}</a>{{else}}{{$b.Status}}{{end}}</td>
 		</tr>
 	{{end}}