Added a UI element to indicate extension support of the chatroom. For
all groups it will always be red since we do not support extensions in
groups. In a 1-1 chat the indicator will either be green/yellow/red
depending on if the friend has support for all/some/none of qTox's
desired extension set.
* Added new negotiating friend state to allow delayed sending of offline
messages
* Added ability to flag currently outgoing message as broken in UI
* Reworked OfflineMsgEngine to support multiple receipt types
* Moved resending logic out of the OfflineMsgEngine
* Moved coordination of receipt and DispatchedMessageId into helper
class usable for both ExtensionReceiptNum and ReceiptNum
* Resending logic now has a failure case when the friend's extension
set is lower than the required extensions needed for the message
* When a user is known to be offline we do not allow use of any
extensions
* Added DB support for broken message reasons
* Added DB support to tie an faux_offline_pending message to a required
extension set
Before we would alternate between status icon and online event icon.
Now each status has its own event version, so status doesn't appear to
alternate between online and the correct status.
e.g.
* viewBox is 16.1 wide, lock is 13.4 wide. change offset from 1.4 to 1.35
* dot is 6.8 wide, change offset from 4.65 to 4.6
* SVG partially generated by inkscape, partially manually edited
Blocked status will represent friends who are removed from Toxcore, but who still exist in UI and can be readded to Toxcore at a future time using their public key. Blocked friends are similar to offline friends, but have a different status icon and will be seperated in the friends list.
antis made us an icon for logout action and I reused cancel call icon
as quit action in tray menu
Refactored methods to change way how icons are loaded in widget.cpp
to make the methods more flexible
This should permanently fix#2491
