home: Hide specific instances from home page

internal/dis/component/control/home/home.html

@@ -20,7 +20,7 @@
 </div>
 
 {{range .Instances}}
-    {{ if .Running }}
+    {{ if and .Running (not .NoPrefixes) }}
         <div class="pure-u-1-3">
             <h3>{{.Slug}}</h3>
             <p>

internal/status/wisski.go

@@ -87,6 +87,10 @@ type LastEdit struct {
 func (bs BundleStatistics) LastEdit() (le LastEdit) {
 	for _, bundle := range bs.Bundles {
 		time := bundle.LastEdit.Time()
+		// skip invalid times
+		if time.Unix() <= 0 {
+			continue
+		}
 		if time.After(le.Time) {
 			le.Valid = true
 			le.Time = time