fixes #878

partially fixes #735

fixes #846

partially fixes #803

don't show subject for replies; fix reply body errors

use object literal to extend Backbone view - fixes shared private property problem; expand reply composer on click

basic IMAP reply drafts added

use backbone $ selector; fix submit button text; disable reply drafts

show reply to/cc/ccList correctly

fix attachments for new messages and replies

enable reply drafts again

fix concurrent view events

fix deletion of previous reply drafts

generic reset, send and draft

adapt classes/IDs

rename file

fix html classes

fix CSS selectors

fix cc/bcc toggle; fix travis errors

add draft UID; fix missing BCC

 Fixing Logger implementation to implement ILogger + fix smtp auto conf in case of php mail() is used

We now rely on CSP instead of sandboxed iframes. Partially addresses #767

This regex takes a bit of a different approach. Instead of matching allowed
characters, it instead checks that disallowed characters are not present.

Here's the regex:
/(ht|f)tp(s?)\:\/\/[a-zA-Z0-9\-\._]+(\:[0-9]+)?(\/[^!*';:@&=+$,?#\ \]]*)*(\?[^!*';:\=@&+$,?#\ \]]+=[^!*';:\=@&$?#\ \]]+(&[^!*';:\=@&+$,?#\ \]]+=[^!*';:\=@&+$?#\ \]]*)*)?(\#\!?[^!*';:@&$,?#\ \]]*)?/

Breaking it down (the URL spec is [here](http://www.w3.org/Addressing/URL/url-spec.txt) ):

/
(ht|f)tp(s?)\:      The scheme (or protocol) with the colon that separates the scheme from the rest of the URL., Matches http: or ftp: or https: or ftps:
\/\/                This matches the double slash which indicates the start of internet protocol parts.
[a-zA-Z0-9\-\._]+   The Internet domain name or IP adresss (e.g. www.google.com, localhost, 192.168.1.1 )
(\:[0-9]+)?         The optional port number preceded by a colon (e.g. :8080)
(\/)?([^!*';:@&=+$,?#\ \]]*) The path. (e.g. Addressing/URL/url-spec.txt )
(
    \?[^!*';:\=@&+$,?%#\ \]]+=[^!*';:\=@&$?#\ \]]+    This matches the first URL paremeter (i.e. ?a=3).
    (&[^!*';:\=@&+$,?%#\ \]]+=[^!*';:\=@&$?#\ \]]+)* This matches subsequent URL parameters (i.e. &x=2&z=7)
)?                  This says that the URL parameters are optional.
(\#\!?[^!*';:@&$,?#\ \]]*)?    This matches zero or one document fragments and shebangs (e.g. #section or #!shebang )
/

The regex is very long and you might notice that there are certain clauses that are repeated, such as "[^!*';:\=@&$?#\ \]]+".

I don't know much about using regexes in PHP, perhaps these clauses could be labeled or put in variables so that the regex could be made shorter?

I'll leave that to someone else who knows better about how that could be done.

Update regex after jenkins test failures.

- Allow colon : in the path.
- Disallow double quotes "

Disallow round brackets in URL parameter values.

Also disallow brackets for the first URL parameter value.