revert to default OS theme for progressbar / fix small glitches in bitcoingui.cpp

src/qt/bitcoingui.cpp

@@ -143,16 +143,13 @@ BitcoinGUI::BitcoinGUI(QWidget *parent):
     progressBarLabel = new QLabel();
     progressBarLabel->setVisible(false);
     progressBar = new QProgressBar();
+    progressBar->setAlignment(Qt::AlignCenter);
     progressBar->setVisible(false);
 
     statusBar()->addWidget(progressBarLabel);
     statusBar()->addWidget(progressBar);
     statusBar()->addPermanentWidget(frameBlocks);
 
-    // define OS independent progress bar style (has to be placed after addWidget(), otherwise we crash)
-    // we did this, because with some OSes default style, text on the progress bar is unreadable
-    progressBar->setStyleSheet("QProgressBar { background-color: transparent; border: 1px solid grey; border-radius: 2px; padding: 1px; text-align: center; } QProgressBar::chunk { background: QLinearGradient(x1: 0, y1: 0, x2: 1, y2: 0, stop: 0 #FF8000, stop: 1 orange); margin: 0px; }");
-
     syncIconMovie = new QMovie(":/movies/update_spinner", "mng", this);
 
     // Clicking on a transaction on the overview page simply sends you to transaction history page
@@ -416,7 +413,7 @@ void BitcoinGUI::trayIconActivated(QSystemTrayIcon::ActivationReason reason)
 {
     if(reason == QSystemTrayIcon::Trigger)
     {
-        // Click on system tray icon triggers "open bitcoin"
+        // Click on system tray icon triggers "show/hide bitcoin"
         toggleHideAction->trigger();
     }
 }