[DevTools] Renaming Scripts panel to Sources panel

LayoutTests/inspector/debugger/resources/pause-on-blocked-by-csp.js

 function test()
 {
-    WebInspector.showPanel("scripts");
+    WebInspector.showPanel("sources");
 
     InspectorTest.addSniffer(WebInspector.CallStackSidebarPane.prototype, "setStatus", setStatus, false);
 
     function setStatus(status)
     {
         // FIXME: For whatever reason, this isn't getting called consistently.
         // Commenting it out to avoid flakeyness. https://bugs.webkit.org/show_bug.cgi?id=96867
         // InspectorTest.addResult("Callstack status set to: '" + status + "'.");
     }
 
     InspectorTest.startDebuggerTest(step1);
 
     function step1()
     {
         DebuggerAgent.setPauseOnExceptions(WebInspector.DebuggerModel.PauseOnExceptionsState.PauseOnUncaughtExceptions);
         InspectorTest.evaluateInPage("setTimeout(testAction, 0);");
         InspectorTest.waitUntilPaused(step2);
     }
 
     function step2(callFrames)
     {
         InspectorTest.captureStackTrace(callFrames);
         InspectorTest.completeDebuggerTest();
     }
 }
 
 window.addEventListener('load', runTest);