Add .tmx as an xml extension (#405)
Add .tmx as an xml extension (#405)

.tmx files are created with the Tiled edtior (http://www.mapeditor.org/).
jens1o/vscode-icons,JimiC/vscode-icons,robertohuertasm/vscode-icons,vscode-icons/vscode-icons,JimiC/vscode-icons,vscode-icons/vscode-icons