Fixed a retain loop in DMPaletteSectionView: DMPaletteContainer has a…

… strong pointer to containerView, containerView has a strong pointer to palette sections, and palette section would have a strong pointer to the DMPaletteContainer. Fixed by making the 'container' pointer weak in DMPaletteSectionView.

DMInspectorPalette/DMPaletteSectionView.h

@@ -23,10 +23,9 @@ enum  {
 @property (nonatomic,assign)            DMPaletteState      state;          // Current state of the section (see DMPaletteState)
 @property (nonatomic,assign)    NSString*           title;          // Title of the header
 @property (nonatomic,assign)    NSUInteger          index;          // Current element index (assign it then use layoutSubviews to rearrange all the other items)
-@property (strong)              DMPaletteContainer* container;      // Related section's container
+@property (weak)                DMPaletteContainer* container;      // Related section's container
 @property (readonly)            NSView*             contentView;    // Section content view
 
-
     // Initialize method
 - (id)initWithContentView:(NSView *) contentView andTitle:(NSString *) headerTitle;