Fix drawing glitch with small text sizes.

The GroupView sometimes has visible pixels when the text size is smaller
than the favicon height. Draw those with the same color as the textview
background.

src/apps/webpositive/URLInputGroup.cpp

@@ -572,7 +572,7 @@ URLInputGroup::URLInputGroup(BMessage* goMessage)
 
 	SetFlags(Flags() | B_WILL_DRAW | B_FULL_UPDATE_ON_RESIZE);
 	SetLowColor(ViewColor());
-	SetViewColor(B_TRANSPARENT_COLOR);
+	SetViewColor(fTextView->ViewColor());
 
 	SetExplicitAlignment(BAlignment(B_ALIGN_USE_FULL_WIDTH,
 		B_ALIGN_VERTICAL_CENTER));