MacOS: Closing with red button won't open window again through tray icon (#40)

* Fixed issue on MacOS where closing BW via the red button then reopening using tray icon wouldn't work

* Added MacOS only condition to the window recreation of the toggleWindow method. Made createWindow public in WindowMain.

src/electron/tray.main.ts

@@ -121,14 +121,19 @@ export class TrayMain {
     }
 
     private toggleWindow() {
-        if (this.windowMain.win == null) {
-            return;
-        }
-
-        if (this.windowMain.win.isVisible()) {
-            this.windowMain.win.hide();
+        if (this.windowMain.win === null) {
+            if (process.platform === 'darwin') {
+                // On MacOS, closing the window via the red button destroys the BrowserWindow instance.
+                this.windowMain.createWindow().then(() => {
+                    this.windowMain.win.show();
+                });
+            }
         } else {
-            this.windowMain.win.show();
+            if (this.windowMain.win.isVisible()) {
+                this.windowMain.win.hide();
+            } else {
+                this.windowMain.win.show();
+            }
         }
     }
 

src/electron/window.main.ts

@@ -81,7 +81,7 @@ export class WindowMain {
         });
     }
 
-    private async createWindow() {
+    async createWindow(): Promise<void> {
         this.windowStates[Keys.mainWindowSize] = await this.getWindowState(Keys.mainWindowSize, this.defaultWidth,
             this.defaultHeight);