Touch support in lists

CEikListBox provides flags that have to be set for every list or grid that requires specific touch-related functionality.

**Table:** Touch-related flags in CEikListBox
Flag	Functionality
`EAknListBoxStylusMultiselectionList`	It enables touch for multi-selection lists.
`EAknListBoxStylusMarkableList`	It enables touch for markable lists or markable grids (`CAknGrid`).
`EAknListBoxItemSpecificMenuDisabled`	This flag has been introduced for single tap. It disables item-specific menu for single tap.