fix: handle null groups

Configuration.cs

@@ -15,10 +15,12 @@ public class Configuration : IPluginConfiguration {
 
     public string SaveFileNameFormat = """
                                        {{ captured_at_local | date.to_string '%Y/%m %b/[%H.%M.%S]' }}
-                                       {{ active_character.name }}
-                                       -
-                                       {{ location }}
-
+                                       {{ if active_character -}}
+                                       {{ active_character.name }} - {{ location }}
+                                       {{- else -}}
+                                       Main Menu or Loading Screen
+                                       {{- end -}}
+                                       
                                        {{- if area }} ({{ area }}) {{- end -}}
                                        {{- if ward }} W{{ ward }} {{- end -}}
                                        {{- if plot -}} P{{ plot }} {{- end -}}

Ui/Tabs/DatabaseTab.cs

@@ -139,7 +139,7 @@ internal class DatabaseTab : ITab {
             ImGui.PushID($"{Enum.GetName(groupBy.Value)}-{label}");
             using var popId = new OnDispose(ImGui.PopID);
 
-            if (!ImGui.TreeNodeEx(label)) {
+            if (!ImGui.TreeNodeEx(label ?? "<unknown>")) {
                 continue;
             }
 
@@ -168,7 +168,7 @@ internal class DatabaseTab : ITab {
         using var treePop = new OnDispose(ImGui.TreePop);
 
         var availWidth = ImGui.GetContentRegionAvail().X;
-        var buttonWidth = availWidth / 2 - ImGui.GetStyle().ItemSpacing.X;
+        var buttonWidth = availWidth / 2 - ImGui.GetStyle().ItemSpacing.X / 2;
 
         if (ImGui.Button("Open", new Vector2(buttonWidth, 0))) {
             Process.Start(new ProcessStartInfo(shot.Path) {