checkpoint on eval2 compiler; setting to disable update checking; cache version check to once per day so that we do not send a lot of extra GH requests every time the debugger starts

src/raddbg/raddbg.mdesk

@@ -320,6 +320,10 @@ RD_VocabTable:
       //- rjf: symbol server
       @default(0) @display_name('Auto Download Debug Info') @description("Automatically tries to download missing debug info from symbol server(s).")
         'auto_download_debug_info': bool,
+      
+      //- rjf: update check
+      @default(1) @display_name('Check For Updates') @description("Enables a small network request to check if there is a newer release version available.")
+        'check_for_updates': bool,
     }
     ```
   }