Changed TweetPage.qml to use RemorseItem when remove tweet

Move delete callbacks to main.qml this way user can swipe backward instead of wait for remorse timeout.

This should follow the SailfishUI logic better than old behave.
add delete LongPressMenu
user remorse popup instead of remorse item
Merge pull request #106 from mike7b4/remorseremove

Changed TweetPage.qml to use RemorseItem when remove tweet