refs #335, style sheet fixes / improvements and support methods

style sheets:
* style sheets with background textures
* scroll area / toolbox style sheet fix
* floating dock widgets
* kept 1st version of stylesheets in backup directory
* removed maininfoarea stylesheet, no longer needed with fixed style sheet

code
* central paintEvent method to enable style sheets in derived widgets
* detect frameless windows, dynamic properties

src/blackgui/components/infowindowcomponent.cpp

@@ -9,6 +9,7 @@
 
 #include "infowindowcomponent.h"
 #include "ui_infowindowcomponent.h"
+#include "../stylesheetutility.h"
 #include "blackmisc/icon.h"
 #include <QTimer>
 #include <QDesktopWidget>
@@ -16,6 +17,7 @@
 using namespace BlackMisc;
 using namespace BlackMisc::Network;
 
+
 namespace BlackGui
 {
     namespace Components
@@ -31,8 +33,11 @@ namespace BlackGui
             this->hide();
             this->m_hideTimer = new QTimer(this);
             this->m_hideTimer->setSingleShot(true);
+            this->onStyleSheetsChanged();
+
             connect(this->m_hideTimer, &QTimer::timeout, this, &CInfoWindowComponent::hide);
             connect(this->ui->pb_Close, &QPushButton::pressed, this, &CInfoWindowComponent::hide);
+            connect(&CStyleSheetUtility::instance(), &CStyleSheetUtility::styleSheetsChanged, this, &CInfoWindowComponent::onStyleSheetsChanged);
         }
 
         /*
@@ -145,5 +150,14 @@ namespace BlackGui
         {
             this->ui->sw_DifferentModes->setCurrentWidget(widget);
         }
+
+        /*
+         * Style sheet changed
+         */
+        void CInfoWindowComponent::onStyleSheetsChanged()
+        {
+            QString st = CStyleSheetUtility::instance().style(CStyleSheetUtility::fileNameInfoWindow());
+            this->setStyleSheet(st);
+        }
     }
 } // namespace