Squashed 'lib/vscode/' changes from 631dbe250bc..cfa2e218100

cfa2e218100 Make sure we actually update the local resource roots (#122957)
206524cbf6f Merge pull request #122941 from microsoft/roblou/fix122701
0ce07162f07 Use the scoped context key service for notebook editor context keys Fix #122701
4fbe56e36b3 Merge pull request #122933 from microsoft/aeschli/122466
32a743d2af9 [JSON] Schema not found error on opening package.json. For #122279
0676e9a727e Fix port theme color typo (#122915)
85f8ebf1687 Fix context on LabelTunnelAction (#122856)
5913f53cab5 Block windows/iframes from preventing the unload (#122835) (#122869)
acd78c82ac6 Ensure that notebook cell URIs work (#122747)
4e185d89863 Merge pull request #122764 from microsoft/roblou/fix122407
7eb7814b56c Try to block webviews from cancelling unloads (#122758)
25092105030 Hardcode keybinding string to fix #122407
b084e6f4a73 Fix currently active indicator preventing editor switching (#122742)
bc2373aaa54 Merge pull request #122732 from microsoft/r156_tabs
d7a86f269a8 Disable tabs by default

git-subtree-dir: lib/vscode
git-subtree-split: cfa2e218100323074ac1948c885448fdf4de2a7f

lib/vscode/src/vs/platform/windows/electron-main/window.ts

@@ -424,6 +424,15 @@ export class CodeWindow extends Disposable implements ICodeWindow {
 		this._win.webContents.on('render-process-gone', (event, details) => this.onWindowError(WindowError.CRASHED, details));
 		this._win.webContents.on('did-fail-load', (event, errorCode, errorDescription) => this.onWindowError(WindowError.LOAD, errorDescription));
 
+		// Prevent windows/iframes from blocking the unload
+		// through DOM events. We have our own logic for
+		// unloading a window that should not be confused
+		// with the DOM way.
+		// (https://github.com/microsoft/vscode/issues/122736)
+		this._win.webContents.on('will-prevent-unload', event => {
+			event.preventDefault();
+		});
+
 		// Window close
 		this._win.on('closed', () => {
 			this._onDidClose.fire();