Devtools UI: Add shortcut for activating/deactivating breakpoints

Source/devtools/front_end/sources/module.json

 {
     "extensions": [
         {
             "type": "@WebInspector.PanelFactory",
             "name": "sources",
             "title": "Sources",
             "order": 2,
             "className": "WebInspector.SourcesPanelFactory"
         },
         {
@@ skipping 108 matching lines @@
                     "platform": "mac",
                     "shortcut": "Meta+Alt+F"
                 },
                 {
                     "platform": "windows,linux",
                     "shortcut": "Ctrl+Shift+F"
                 }
             ]
         },
         {
+            "type": "@WebInspector.ActionDelegate",
+            "actionId": "debugger.toggle-breakpoints-active",
+            "iconClass": "breakpoint-toolbar-item",
+            "className": "WebInspector.SourcesPanel.DebuggingActionDelegate",
+            "contextTypes": ["WebInspector.SourcesPanel"],
+            "bindings": [
+                {
+                    "platform": "windows,linux",
+                    "shortcut": "Ctrl+F8"
+                },
+                {
+                    "platform": "mac",
+                    "shortcut": "Meta+F8"
+                }
+            ]
+        },
+        {
             "type": "context-menu-item",
             "location": "mainMenu/navigate",
             "actionId": "sources.search.toggle"
         },
         {
             "type": "@WebInspector.Revealer",
             "contextTypes": ["WebInspector.UILocation"],
             "className": "WebInspector.SourcesPanel.UILocationRevealer"
         },
         {
@@ skipping 194 matching lines @@
         "filteredItemSelectionDialog.css",
         "uiList.css",
         "navigatorView.css",
         "revisionHistory.css",
         "serviceWorkersSidebar.css",
         "sourcesPanel.css",
         "sourcesSearch.css",
         "sourcesView.css"
     ]
 }