* Warn the user that fields with no value and not it the field template list
will be removed from the component before exiting the edit component in
schematic dialog.
* Add a function to TEMPLATES class to check if template list contains a
field with a given name.
* Move the function to display the edit component in schematic dialog into
the SCH_EDIT_FRAME class.
* Doxygen and coding style policy fixes.
* Remove unused member variable m_SizeVisu from base screen object.
* Move nearest grid position code into base screen object.
* Add get cursor position method to base screen object.
* Add position parameter to OnHotKey method in base draw frame and all
derived objects.
* Pass logical position on left mouse button click and double click
events instead of device position.
* Pass logical position to on right mouse button click instead of device
position.
* Use logical event position parameter for locating items in EESchema
instead of the stored position.
* Remove unused position parameter when displaying component edit dialog
in EESchema.
* Comment out debugging macro in eeschema/template_field_names.cpp that was
preventing debug builds using wxWidgets 2.8.x.
Wayne Stambaugh