[geary: 1/2] Use native separators for conversation list

[Michael Gratton <mjog src gnome org>]

commit 1e9e976efb42261f73dd1eb8b211c15ca7928d4c
Author: John Renner <john jrenner net>
Date:   Tue Apr 6 17:49:24 2021 -0700

    Use native separators for conversation list

 src/client/conversation-list/conversation-list-view.vala      | 1 +
 src/client/conversation-list/formatted-conversation-data.vala | 9 ---------
 2 files changed, 1 insertion(+), 9 deletions(-)
---
diff --git a/src/client/conversation-list/conversation-list-view.vala 
b/src/client/conversation-list/conversation-list-view.vala
index c64fb129c..37a2a6401 100644
--- a/src/client/conversation-list/conversation-list-view.vala
+++ b/src/client/conversation-list/conversation-list-view.vala
@@ -43,6 +43,7 @@ public class ConversationListView : Gtk.TreeView, Geary.BaseInterface {
         base_ref();
         set_show_expanders(false);
         set_headers_visible(false);
+        set_grid_lines(Gtk.TreeViewGridLines.HORIZONTAL);
 
         this.config = config;
 
diff --git a/src/client/conversation-list/formatted-conversation-data.vala 
b/src/client/conversation-list/formatted-conversation-data.vala
index b21a931fc..afbb1f690 100644
--- a/src/client/conversation-list/formatted-conversation-data.vala
+++ b/src/client/conversation-list/formatted-conversation-data.vala
@@ -342,15 +342,6 @@ public class FormattedConversationData : Geary.BaseObject {
             y += ink_rect.height + ink_rect.y + (int) (SPACING * 1.2);
         }
 
-        // Draw separator line.
-        if (ctx != null && cell_area != null) {
-            ctx.set_line_width(1.0);
-            Util.Gtk.set_source_color_from_string(ctx, CountBadge.UNREAD_BG_COLOR);
-            ctx.move_to(cell_area.x - 1, cell_area.y + cell_area.height);
-            ctx.line_to(cell_area.x + cell_area.width + 1, cell_area.y + cell_area.height);
-            ctx.stroke();
-        }
-
         if (recalc_dims) {
             FormattedConversationData.preview_height = preview_height;
             FormattedConversationData.cell_height = y + preview_height;