Fix notifications about own messages

ui/messages/message.go

@@ -30,7 +30,6 @@ type UIMessage interface {
 	Buffer() []tstring.TString
 	Height() int
 
-	SenderID() string
 	RealSender() string
 	RegisterMatrix(matrix ifc.MatrixContainer)
 }

ui/messages/meta.go

@@ -34,6 +34,10 @@ func (meta *BasicMeta) Sender() string {
 	return meta.BSender
 }
 
+func (meta *BasicMeta) SenderID() string {
+	return meta.BSender
+}
+
 // SenderColor returns the color the name of the sender should be shown in.
 func (meta *BasicMeta) SenderColor() tcell.Color {
 	return meta.BSenderColor