CSS: Add show colors to default-dark.css

gajim/data/style/default-dark.css

@@ -50,3 +50,15 @@ .gajim-msg-correcting text {
 .gajim-search-highlight {
     color: rgb(30, 80, 80)
 }
+.gajim-status-online {
+    color: rgb(102, 191, 16);
+}
+.gajim-status-away {
+    color: rgb(255, 133, 51);
+}
+.gajim-status-dnd {
+    color: rgb(230, 46, 0);
+}
+.gajim-status-offline {
+    color: rgb(154, 154, 154);
+}