Make time after responseEnd have a more accurate name (#5582)

Author: mstange

src/components/tooltip/NetworkMarker.tsx

@@ -46,7 +46,7 @@ const HUMAN_LABEL_FOR_PHASE: Record<NetworkPhaseName, string> = {
   connectEnd: 'Waiting for HTTP request',
   requestStart: 'HTTP request and waiting for response',
   responseStart: 'HTTP response',
-  responseEnd: 'Waiting to transmit the response',
+  responseEnd: 'Waiting for main thread',
   endTime: 'End',
 };
 

src/test/components/__snapshots__/TooltipMarker.test.tsx.snap

@@ -403,7 +403,7 @@ exports[`TooltipMarker renders properly network markers where content type is bl
     <div
       class="tooltipLabel"
     >
-      Waiting to transmit the response
+      Waiting for main thread
       :
     </div>
     <div
@@ -589,7 +589,7 @@ exports[`TooltipMarker renders properly network markers where content type is mi
     <div
       class="tooltipLabel"
     >
-      Waiting to transmit the response
+      Waiting for main thread
       :
     </div>
     <div
@@ -849,7 +849,7 @@ exports[`TooltipMarker renders properly network markers with a preconnect part 2
     <div
       class="tooltipLabel"
     >
-      Waiting to transmit the response
+      Waiting for main thread
       :
     </div>
     <div
@@ -1045,7 +1045,7 @@ exports[`TooltipMarker renders properly network markers with a preconnect part c
     <div
       class="tooltipLabel"
     >
-      Waiting to transmit the response
+      Waiting for main thread
       :
     </div>
     <div
@@ -1299,7 +1299,7 @@ exports[`TooltipMarker renders properly normal network markers 1`] = `
     <div
       class="tooltipLabel"
     >
-      Waiting to transmit the response
+      Waiting for main thread
       :
     </div>
     <div