This adds support for displaying recieved spoilers, but not sending
them. Spoilers are displayed as a black rectangle, and can be clicked on
to be revealed. If the last message in a channel was a spoiler, it is
not shown on the left sidebar.
The spoiler blackening is done in CSS, but to check if a message
contains a spoiler for determining if it should cause a different cursor
to be displayed and if it should be shown in the sidebar, a simple check
of if the message contains "data-mx-spoiler" is used.
* Message with multiple mentions are not broken in IRC. Fix#267
* Editing a message won't remove mentions anymore
(cherry picked from commit bb3b3bc088)
Now lastEvent() return the last event and lastActiveTime() and
lastEventToString() are convenient functions to get the visual
representation and the timestamp.
We are also now fetching new events when the timeline is empty
so that we can correctly order the rooms. In the future, we should
instead probably cache the last event in an SQLite database to optimize
the startup time.
This also ignore state event when the configuration ask to ignore them.
Fix: #97
The C++ header signature was using a C++17 type alias and this was
confusing MOC. Just changing the signature to the more verbose type name
fix the bug.
