Handle resource changes when the resources is already evicted from cache

Also fix a logical flaw in the cache resizer that made it too aggressive. After this I haven't been able to reproduce #11988, but I need to look closer.

Closes #11973
Updates #11988

config/allconfig/allconfig.go

@@ -65,6 +65,7 @@ type InternalConfig struct {
 	Verbose        bool
 	Clock          string
 	Watch          bool
+	FastRenderMode bool
 	LiveReloadPort int
 }