Fix bugs in new ComposeView

Fix the following issues in the new ComposeView:

• "Sort by", "Name", and "Last Contacted" strings in RecipientListView not localised
• Names don't appear to be actually sorted by name/email even though they should be
• Tapping the "CC/Bcc" field opens up two fields, "Cc" and "Bcc" but deselecting both of them without having entered any information does currently not lead to them being closed into a single "Cc/Bcc" field again
• After entering a recipient in any recipient field, the Send button only activates once the "Subject" or "Body" fields are modified instead of becoming available immediately upon entering a recipient
• After the Send button is activated once, it is not deactivated after the subject or recipients list is emptied by the user
• It is not possible to delete added recipients by tapping on their blue "bubble" (capsule)
• Suggestions when typing in a contact are not shown.
• There is a UI bug when using the software keyboard while the RecipientListView is showing: