prepare for msg read arrow change

src/types.jl

@@ -50,17 +50,20 @@ end
 using Dates
 function Base.show(io::IO, m::MatrixMsg; muser::Union{Nothing,MatrixUser} = nothing)
     global user
+    dirforward = false
     if muser === nothing
         if isdefined(MatrixChat, :user)
-            direction = m.sender == user ?
-                " ««« " : " »»» "
-        else
-            direction = " »»» "
+            dirforward = m.sender == user
         end
     else
-        direction = " »»» "
+        dirforward = m.sender == muser
     end
 
+    # read = m.isread
+    read = false
+    direction = dirforward ? (read ? " ««« " : " <<< ") :
+        (read ? " »»» " : " >>> ")
+
     d = Dates.epochms2datetime(m.timestamp +
                        Dates.datetime2epochms(Dates.unix2datetime(0)))
     dtfmt = if Dates.Hour(now()) - Dates.Hour(d) < Dates.Hour(24)