Update 1.1.0

[dprietob]

This release brings rich text descriptions and several refinements:

• Format task descriptions with headings, bold, italic, underline, strikethrough, text color and lists.
• See the completion date of finished tasks.
• Edit and delete tasks and groups from a per-item menu.
• The task list now uses the full width of the window.
• Task descriptions can now hold much longer text.
• Added Polish, Russian, Korean, Norwegian, Swedish, Hindi and Greek translations.