add some icons and only store members by resource

cache.go

@@ -18,6 +18,9 @@ import (
 // global or app-level map/cache
 var textureCache = make(map[string]gdk.Paintabler)
 
+// Invalid images, if an image/avatar cannot be loaded on the system (e.g: incompatible format) it's put here
+var invalidImages = make(map[string]bool) 
+
 func ensureCache() (string, error) {
 	cachePath := configdir.LocalCache("lambda-im")
 	err := configdir.MakePath(cachePath) // Ensure it exists.