Research how many characters users are typing before dismissing the c…

…mdpal (#7165)

Add some user research to determine what the average number of characters a user types before executing a cmdpal action.

This might need to be modified when it merges with #6732

(cherry picked from commit 46f7772+7bf9225c1)

src/cascadia/TerminalApp/CommandPalette.cpp

@@ -187,14 +187,16 @@ namespace winrt::TerminalApp::implementation
         {
             const auto actionAndArgs = command.Action();
             _dispatch.DoAction(actionAndArgs);
-            _close();
 
             TraceLoggingWrite(
                 g_hTerminalAppProvider, // handle to TerminalApp tracelogging provider
                 "CommandPaletteDispatchedAction",
                 TraceLoggingDescription("Event emitted when the user selects an action in the Command Palette"),
+                TraceLoggingUInt32(_searchBox().Text().size(), "SearchTextLength", "Number of characters in the search string"),
                 TraceLoggingKeyword(MICROSOFT_KEYWORD_MEASURES),
                 TelemetryPrivacyDataTag(PDT_ProductAndServicePerformance));
+
+            _close();
         }
     }