Calendar: Add SIMPLE_MEMO_WITH_SUMMARY capability
Right now, when modifying or adding a new memo using E_CAL_STATIC_CAPABILITY_SIMPLE_MEMO
, it uses the first line in the description as a summary and overwrites the existing summary. we could prevent this, by adding a text box for summary and another for the description using something like E_CAL_STATIC_CAPABILITY_SIMPLE_MEMO_WITH_SUMMARY