Improvements on GUI + API:

- Add generic key-value dialog
- Allow multiple file upload
- Add ESC and enter key handle to dialog
- Improve File application

src/themes/system/afx-app-window.css

@@ -1,3 +1,6 @@
+afx-app-window {
+    outline: none;
+}
 afx-app-window div.afx-window-wrapper{
     padding:0;
     display: flex;