Fix mapping export UI prompt not supporting creation of new files

Author: Col-E

recaf-ui/src/main/java/software/coley/recaf/util/FileChooserBundle.java

@@ -113,7 +113,7 @@ public File showFileOpen(@Nullable Window window) {
 	 */
 	@Nullable
 	public File showFileExport(@Nullable Window window) {
-		File file = fileExport.showOpenDialog(window);
+		File file = fileExport.showSaveDialog(window);
 		if (file != null)
 			fileExport.setInitialDirectory(file.getParentFile());
 		if (fileExportListener != null)