Make sure the channel list button stays always visible

client/css/style.css

@@ -470,7 +470,13 @@ kbd {
 	width: 36px;
 }
 
+/* Channel list button stays fixed when scrolling... */
 #viewport .lt {
+	position: fixed;
+}
+
+/* ... Except on chat windows, relative to include the notification dot */
+#viewport #chat .lt {
 	position: relative;
 }
 
@@ -2286,6 +2292,11 @@ part/quit messages where we don't load previews (adds a blank line otherwise) */
 		display: flex;
 	}
 
+	/* On mobile display, channel list button stays at the top */
+	#viewport .lt {
+		position: relative;
+	}
+
 	#chat .userlist {
 		height: 100%;
 		position: absolute;