fix: searching for lines in debug console that start with "!" microsoft#174146 (microsoft#210178)

* Add "\" escape character to filter field

* Add "\escape" tooltip to filter field

Author: 4-tel

src/vs/workbench/contrib/debug/browser/repl.ts

@@ -143,7 +143,7 @@ export class Repl extends FilterViewPane implements IHistoryNavigationWidget {
 		super({
 			...options,
 			filterOptions: {
-				placeholder: localize({ key: 'workbench.debug.filter.placeholder', comment: ['Text in the brackets after e.g. is not localizable'] }, "Filter (e.g. text, !exclude)"),
+				placeholder: localize({ key: 'workbench.debug.filter.placeholder', comment: ['Text in the brackets after e.g. is not localizable'] }, "Filter (e.g. text, !exclude, \\escape)"),
 				text: filterText,
 				history: JSON.parse(storageService.get(FILTER_HISTORY_STORAGE_KEY, StorageScope.WORKSPACE, '[]')) as string[],
 			}

src/vs/workbench/contrib/debug/browser/replFilter.ts

@@ -28,7 +28,9 @@ export class ReplFilter implements ITreeFilter<IReplElement> {
 		if (query && query !== '') {
 			const filters = splitGlobAware(query, ',').map(s => s.trim()).filter(s => !!s.length);
 			for (const f of filters) {
-				if (f.startsWith('!')) {
+				if (f.startsWith('\\')) {
+					this._parsedQueries.push({ type: 'include', query: f.slice(1) });
+				} else if (f.startsWith('!')) {
 					this._parsedQueries.push({ type: 'exclude', query: f.slice(1) });
 				} else {
 					this._parsedQueries.push({ type: 'include', query: f });