Fix browse dialog parenting

main.js

@@ -1,4 +1,9 @@
 const { app, BrowserWindow, Menu, dialog, ipcMain, fs } = require('electron');
+
+// Some Linux/remote desktop setups expose a broken GPU context to Electron.
+// Fall back to software rendering instead of crashing on startup.
+app.disableHardwareAcceleration();
+
 function createWindow () {
     const win = new BrowserWindow({
 	width: 950,
@@ -242,22 +247,22 @@ app.on('activate', () => {
 // Reply to calls from browser button
 ipcMain.on('browseFolder', (event, args) => {
     console.log('received a message: '+args);
-    dialog.showOpenDialog({ title: "Select folder",
-			    defaultPath : app.getPath('temp'),
-			    properties:["openDirectory"]}
-			 ).then(result => {
-			     console.log(result)
-			     if (result.canceled || result.filePaths.length === 0) {
-				 return;
-			     }
-			     setImmediate(function() {
-				 var focusedWindow = BrowserWindow.getFocusedWindow();
-				 focusedWindow.webContents.send('browseFolder',result.filePaths);
-				 app.setPath('temp',result.filePaths[0]);
-			     });
-			 }).catch(err => {
-			     console.log(err);
-			 })
+    const senderWindow = BrowserWindow.fromWebContents(event.sender);
+    dialog.showOpenDialog(senderWindow, { title: "Select folder",
+					  defaultPath : app.getPath('temp'),
+					  properties:["openDirectory"]}
+			       ).then(result => {
+				     console.log(result)
+				     if (result.canceled || result.filePaths.length === 0) {
+					 return;
+				     }
+				     setImmediate(function() {
+					 senderWindow.webContents.send('browseFolder',result.filePaths);
+					 app.setPath('temp',result.filePaths[0]);
+				     });
+				 }).catch(err => {
+				     console.log(err);
+				 })
 });
 
 //ipcMain.on('browseFolder-send', (event, args) => {