fix profile pictures in conversations

Profile picture from contact was used for both its messages and local
ones. The later one is now displaying our default picture.

It is a temporary measure to fix a confusing situation and the default
picture is meant to be replaced by the chosen picture for local
account.

Change-Id: Id347f59ec6afe4ea9750702e6c8eabaa5e6fedad
Reviewed-by: Olivier Soldano <olivier.soldano@savoirfairelinux.com>

src/MessagesVC.mm

@@ -208,7 +208,12 @@
     [result updateWidthConstraint:finalWidth];
 
     auto& imageManip = reinterpret_cast<Interfaces::ImageManipulationDelegate&>(GlobalInstances::pixmapManipulator());
-    [result.photoView setImage:QtMac::toNSImage(qvariant_cast<QPixmap>(imageManip.conversationPhoto(*conv, convModel_->owner)))];
+    if (isOutgoing) {
+        [result.photoView setImage:[NSImage imageNamed:@"default_user_icon"]];
+    } else {
+        [result.photoView setImage:QtMac::toNSImage(qvariant_cast<QPixmap>(imageManip.conversationPhoto(*conv, convModel_->owner)))];
+    }
+
     return result;
 }