Kebabize sources settings

Bug: chromium:1467464, b:320405843
Change-Id: I2ebf8c7dd2a70079efa5213e3a26fb5b05306936
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/5250271
Reviewed-by: Simon Zünd <[email protected]>
Auto-Submit: Danil Somsikov <[email protected]>
Commit-Queue: Simon Zünd <[email protected]>
diff --git a/front_end/panels/sources/WatchExpressionsSidebarPane.ts b/front_end/panels/sources/WatchExpressionsSidebarPane.ts
index 93230c0..7b0bfd3 100644
--- a/front_end/panels/sources/WatchExpressionsSidebarPane.ts
+++ b/front_end/panels/sources/WatchExpressionsSidebarPane.ts
@@ -109,7 +109,7 @@
     // to an e2e test or no longer accesses this variable directly.
     this.watchExpressions = [];
     this.watchExpressionsSetting =
-        Common.Settings.Settings.instance().createLocalSetting<string[]>('watchExpressions', []);
+        Common.Settings.Settings.instance().createLocalSetting<string[]>('watch-expressions', []);
 
     this.addButton = new UI.Toolbar.ToolbarButton(
         i18nString(UIStrings.addWatchExpression), 'plus', undefined, 'add-watch-expression');