[COMMENT] Removed stub comment.
[UI] Removed background from fragment - is is transparent now.
[FIX] Fixed fragment overlay problem. Attach to root flag is the key!
[COMMENT] Removed obsolete comments.
[STYLE] Fixed intendation.
[ADD] Method to remove entry widget from UI.
[ADD] Methods to add records and / or entries pending to remove.
[ADD] Manager is now able to remove records and / or entries.
[MODIF] Writer thread is now responsible for entities deletion from
database and notifies other modules via listener.
[MODIF] Fully implement WriterThread onComplete listener.
[MODIF] Delete entry via button.