fix: chat window scrolling issues

The chat window in group chats and conferences should now stay scrolled
to the bottom of the chat history when the peer list is unhidden

Author: JFreegman

src/conference.c

@@ -1159,6 +1159,12 @@ static void conference_onDraw(ToxWindow *self, Toxic *toxic)
 
     curs_set(1);
 
+    if (self->x != x2 && !self->scroll_pause) {
+        line_info_reset_start(self, ctx->hst);
+    }
+
+    self->x = x2;
+
     if (ctx->len > 0) {
         mvwprintw(ctx->linewin, 0, 0, "%ls", &ctx->line[ctx->start]);
     }

src/groupchats.c

@@ -2116,6 +2116,10 @@ static void groupchat_onDraw(ToxWindow *self, Toxic *toxic)
 
     if (self->x != x2) {
         groupchat_update_statusbar_topic(self, toxic->tox);
+
+        if (!self->scroll_pause) {
+            line_info_reset_start(self, ctx->hst);
+        }
     }
 
     draw_groupchat_top_bar(self, toxic, x2);