fix: make grouping work

Ui/Tabs/DatabaseTab.cs

@@ -44,11 +44,11 @@ internal class DatabaseTab : ITab {
 
         var first = true;
         foreach (var groupBy in this.GroupBys) {
-            if (first) {
-                ImGui.TextUnformatted($"Group by {Enum.GetName(groupBy)}");
-            } else {
-                ImGui.TextUnformatted($"then by {Enum.GetName(groupBy)}");
-            }
+            ImGui.TextUnformatted(
+                first
+                    ? $"Group by {Enum.GetName(groupBy)}"
+                    : $"then by {Enum.GetName(groupBy)}"
+            );
             first = false;
         }
 
@@ -59,8 +59,8 @@ internal class DatabaseTab : ITab {
         }
 
         var comboSize = ImGui.GetContentRegionAvail().X
-            - buttonSize.X
-            - ImGui.GetStyle().ItemSpacing.X;
+                        - buttonSize.X
+                        - ImGui.GetStyle().ItemSpacing.X;
 
         ImGui.SetNextItemWidth(comboSize);
         if (ImGui.BeginCombo("##then-by", Enum.GetName(this._selectedGroupBy))) {
@@ -134,6 +134,14 @@ internal class DatabaseTab : ITab {
 
         foreach (var grouping in grouped) {
             var label = grouping.Key;
+
+            // FIXME: label should be unique (pushid?)
+            if (!ImGui.TreeNodeEx(label)) {
+                continue;
+            }
+
+            using var treePop = new OnDispose(ImGui.TreePop);
+
             if (groupBy.Next == null) {
                 this.DrawShots(grouping);
             } else {