Removed and repleaced all Nodes delete without a previous close() call. This fixes a possible crash on UIListBox, UITable and UITabWidget.

Fixed UIWindow frame buffer pixel density.
Allow "text-decoration" CSS property.
Fixed a crash on the TextureAtlasEditor.
Added Action::getCurrentProgress().

--HG--
branch : dev

include/eepp/math/interpolation1d.hpp

@@ -126,6 +126,8 @@ class EE_API Interpolation1d {
 		UintPtr getData() const;
 
 		void setData(const UintPtr & data);
+
+		Float getCurrentProgress();
 	protected:
 		UintPtr mData;
 		int mType;

include/eepp/math/interpolation2d.hpp

@@ -128,6 +128,8 @@ class EE_API Interpolation2d {
 		UintPtr getData() const;
 
 		void setData(const UintPtr & data);
+
+		Float getCurrentProgress();
 	protected:
 		UintPtr mData;
 		int mType;