Refactoring work to make new folder and rename folder share
the same implementation (fixes NB#58817).
* src/modest-platform.h:
* New rename_folder_dialog method.
* src/modest-ui-actions.c:
* Now rename uses a dialog in modest platform, sharing the
implementation with new folder dialog. Also removed old
dialog implementation.
* src/maemo/modest-platform.c:
* New method rename_folder_dialog, and refactored
new_folder_dialog, creating name_folder_dialog
that implements the same logic and controls for
both UI actions.
pmo-trunk-r2367