message: Set IconGrid default icon size to 1
  The IconGrid control is unusable with an icon size of 0. Best to avoid
  it, since it can lead to division by 0 in some cases.
diff: @@ -110,7 +110,7 @@ private:
  Index mHighlightIndex = constants::NO_SELECTION; /**< Current highlight index. */
  Index mCurrentSelection = constants::NO_SELECTION; /**< Currently selected item index. */
  - int mIconSize = 0; /**< Size of the icons. */
  + int mIconSize = 1; /**< Size of the icons. */
  int mIconMargin = 0; /**< Spacing between icons and edges of the IconGrid. */
  bool mShowTooltip = false; /**< Flag indicating that we want a tooltip drawn near an icon when hovering over it. */
  