QString::fromAscii() is obsolete in Qt5. Replace it with fromLatin1().

This change is Qt4/Qt5 neutral.

src/Gui/DockWindowManager.cpp

@@ -46,7 +46,7 @@ DockWindowItems::~DockWindowItems()
 void DockWindowItems::addDockWidget(const char* name, Qt::DockWidgetArea pos, bool visibility, bool tabbed)
 {
     DockWindowItem item;
-    item.name = QString::fromAscii(name);
+    item.name = QString::fromLatin1(name);
     item.pos = pos;
     item.visibility = visibility;
     item.tabbed = tabbed;