Update res/values-fr/strings.xml
Clean up the code a bit
First very basic version of a split screen for message list + view
Add marker in message list for currently opened message
Add setting to configure the splitview mode
Add 1px divider between message list and message view in split view
MessageList: add setting to allow 0 preview lines
Add hotkeys from MessageView to MessageList
Add message view menu items to MessageList
Go back to message list when using the back button in message view
Make sure swipe gestures only work on the message list
Fix "return to list after delete"
Remember last list view state when going back to a previous message list
fragment.

Fixes issue 4854.
Show thread as unread if at least one of the messages of the thread is
unread.

Fixes issue 4759.
Merge pull request #235 from rk4an/patch-1

Update res/values-fr/strings.xml
Fix the span range for the text in front of the message preview
Merge branch 'master' of github.com:k9mail/k-9
Merge pull request #238 from maniac103/thread-unread

Show thread as unread if at least one of the messages of the thread is unread.
Merge branch 'remember-message-list-state' of git://github.com/maniac103/k-9
Refactor code to restore the list state