Styling: Fix row selection state

data/stylesheet/_index.scss

@@ -173,7 +173,15 @@ columnview {
         padding: 0.5em;
     }
 
-    row:nth-child(odd) {
+    row:nth-child(odd):not(:selected):not(:focus-visible) {
         background: #{'@bg_color'};
     }
+
+    // Highlight selected rows with the accent color, like the theme does
+    // for keyboard navigation, so mouse and keyboard selection look the same
+    listview row:selected,
+    listview row:focus-visible:selected {
+        background: #{'@selected_bg_color'};
+        color: #{'@selected_fg_color'};
+    }
 }

src/Views/LogView/LogView.vala

@@ -18,7 +18,10 @@ public class Monitor.LogView : Granite.Bin {
 
         model = new SystemdLogModel ();
 
-        var selection_model = new Gtk.NoSelection (model);
+        var selection_model = new Gtk.SingleSelection (model) {
+            autoselect = false,
+            can_unselect = true
+        };
 
         var header_factory = new Gtk.SignalListItemFactory ();
         header_factory.setup.connect (setup_header);