qt: Clarify some comments

Signed-off-by: Wladimir J. van der Laan <laanwj@gmail.com>
Github-Pull: #12374
Rebased-From: 1e5d14b3f7db814505279d346f0b819443753e66
Tree-SHA512: 367be993e298cb822618c2c64f83163c65d93ca588f183584d032fa1391ddac292e7a2882118037913d192ba77e1b2d5ab518ad029e0b05230be45da2d0c047c

src/qt/bitcoin.cpp

@@ -516,14 +516,14 @@ void BitcoinApplication::initializeResult(bool success)
 #endif
         pollShutdownTimer->start(200);
     } else {
-        Q_EMIT splashFinished(window);
+        Q_EMIT splashFinished(window); // Make sure splash screen doesn't stick around during shutdown
-        quit(); // Exit main loop
+        quit(); // Exit first main loop invocation
     }
 }
 
 void BitcoinApplication::shutdownResult()
 {
-    quit(); // Exit main loop after shutdown finished
+    quit(); // Exit second main loop invocation after shutdown finished
 }
 
 void BitcoinApplication::handleRunawayException(const QString &message)