Add rainbownotice command

ui/command-processor.go

@@ -92,6 +92,7 @@ func NewCommandProcessor(parent *MainView) *CommandProcessor {
 			"mstate":     {"msetstate"},
 			"rb":         {"rainbow"},
 			"rbme":       {"rainbowme"},
+			"rbn":        {"rainbownotice"},
 			"myroomnick": {"roomnick"},
 			"createroom": {"create"},
 			"dm":         {"pm"},
@@ -166,6 +167,8 @@ func NewCommandProcessor(parent *MainView) *CommandProcessor {
 			"cprof":      cmdCPUProfile,
 			"trace":      cmdTrace,
 
+			"rainbownotice": cmdRainbowNotice,
+
 			"fingerprint":   cmdFingerprint,
 			"devices":       cmdDevices,
 			"verify-device": cmdVerifyDevice,

ui/commands.go

@@ -113,6 +113,10 @@ func cmdRainbowMe(cmd *Command) {
 	makeRainbow(cmd, event.MsgEmote)
 }
 
+func cmdRainbowNotice(cmd *Command) {
+	makeRainbow(cmd, event.MsgNotice)
+}
+
 func cmdNotice(cmd *Command) {
 	go cmd.Room.SendMessage(event.MsgNotice, strings.Join(cmd.Args, " "))
 }