Client|Console: Improved log widget behavior

When opening the log for the first time, don't waste time scrolling
through all the messages since launch. Instead, open as normally with
a clear log.

The problem was that the log wrapper wasn't told the width of the
widget until it was drawn (visible) for the first time.

doomsday/client/src/ui/widgets/consolewidget.cpp

@@ -88,7 +88,7 @@ DENG2_PIMPL(ConsoleWidget)
     }
 
     void expandLog(int delta, bool useOffsetAnimation)
-    {
+    {       
         // Cannot expand if the user is grabbing the top edge.
         if(grabbed == TopEdge) return;
 
@@ -103,7 +103,7 @@ DENG2_PIMPL(ConsoleWidget)
         height->setStyle(style);
         height->set(height->animation().target() + delta, .25f);
 
-        if(useOffsetAnimation)
+        if(useOffsetAnimation && opened)
         {
             // Sync the log content with the height animation.
             log->setContentYOffset(Animation::range(style,

doomsday/client/src/ui/widgets/logwidget.cpp

@@ -858,6 +858,7 @@ void LogWidget::update()
 {
     ScrollAreaWidget::update();
 
+    d->sink.setWidth(d->contentWidth());
     d->fetchNewCachedEntries();
 
     // The log widget's geometry is fully dynamic -- regenerated on every frame.
@@ -866,7 +867,6 @@ void LogWidget::update()
 
 void LogWidget::drawContent()
 {
-    d->sink.setWidth(d->contentWidth());
     d->draw();
 }