editor: add confirmation prompt when executing clear editor history

[vince-fugnitto]

Feature Description

The goal is to prompt end-users to confirm whether or not they want to actually clear their editor history (the history of recently opened editors). The confirmation will prevent clearing history accidentally for instance, and aligns with the behavior present in VS Code.

Related Code

Command Registration:

theia/packages/editor/src/browser/editor-navigation-contribution.ts

Lines 85 to 88 in 18b2503

	this.commandRegistry.registerHandler(EditorCommands.CLEAR_EDITOR_HISTORY.id, {
	execute: () => this.locationStack.clearHistory(),
	isEnabled: () => this.locationStack.locations().length > 0
	});

ConfirmDialog:

Definition:

theia/packages/core/src/browser/dialogs.ts

Line 360 in 18b2503

export class ConfirmDialog extends AbstractDialog<boolean> {

Example Usage:

theia/packages/core/src/browser/dialogs.ts

Lines 394 to 402 in 18b2503

	export async function confirmExit(): Promise<boolean> {
	const safeToExit = await new ConfirmDialog({
	title: nls.localizeByDefault('Are you sure you want to quit?'),
	msg: nls.localize('theia/core/quitMessage', 'Any unsaved changes will not be saved.'),
	ok: Dialog.YES,
	cancel: Dialog.NO,
	}).open();
	return safeToExit === true;
	}

[souravghosh01]

I want to work on this issue

[vince-fugnitto]

I want to work on this issue

@souravghosh01 please go ahead :)