Hard-code black background and gray text for cover widget tooltip.

BUG:134

ChangeLog

@@ -111,6 +111,7 @@
 62. Install Cantata-specific KDE icons into
     /usr/share/kde4/apps/cantata/icons/hicolor/
 63. When refresh button is pressed send an update and stats request to MPD.
+64. Hard-code black background and gray text for cover widget tooltip.
 
 0.8.3.1
 -------

widgets/coverwidget.cpp

@@ -155,6 +155,7 @@ bool CoverWidget::eventFilter(QObject *object, QEvent *event)
                 toolTip+=QString("<br/><img src=\"%1\"/>").arg(coverFileName);
             }
         }
+        setStyleSheet(QLatin1String("QToolTip {background-color:#111111; color: #DDDDDD}"));
         setToolTip(toolTip);
     }
     return QObject::eventFilter(object, event);