Recent small improvements #6

Hi larpers!

Here is a summary of the small improvements recently added to Larpwriter:

• now in the list of characters it is indicated if a character has been sent by email. The date of mailing is shown in the character's page
• drop-down menus to select a person, group, player, organizer names are sorted alphabetically
• the list of organizers with their contact information is downloadable into an Excel file
• in edit mode, the button "Remove formatting " to delete all styles of selected text (the button is shaped like an eraser).

Thanks to Julian, Niko and Mik for their comments and suggestions!