Fix microsoft#162116 (microsoft#162244)

* Fix conflicting changes count warning when resuming edit session

* Don't use custom dialog

Author: joyceerhl

src/vs/workbench/contrib/editSessions/browser/editSessions.contribution.ts

@@ -414,13 +414,12 @@ export class EditSessionsContribution extends Disposable implements IWorkbenchCo
 
 				const result = await this.dialogService.show(
 					Severity.Warning,
-					changes.length > 1 ?
-						localize('resume edit session warning many', 'Resuming your edit session will overwrite the following {0} files. Do you want to proceed?', changes.length) :
-						localize('resume edit session warning 1', 'Resuming your edit session will overwrite {0}. Do you want to proceed?', basename(changes[0].uri)),
+					conflictingChanges.length > 1 ?
+						localize('resume edit session warning many', 'Resuming your edit session will overwrite the following {0} files. Do you want to proceed?', conflictingChanges.length) :
+						localize('resume edit session warning 1', 'Resuming your edit session will overwrite {0}. Do you want to proceed?', basename(conflictingChanges[0].uri)),
 					[cancel, yes],
 					{
-						custom: true,
-						detail: changes.length > 1 ? getFileNamesMessage(conflictingChanges.map((c) => c.uri)) : undefined,
+						detail: conflictingChanges.length > 1 ? getFileNamesMessage(conflictingChanges.map((c) => c.uri)) : undefined,
 						cancelId: 0
 					});