Scrollbars disappear on empty DataGrids

[erikdarlingdata]

Summary

When a DataGrid has no data, the scrollbars disappear. They should remain visible (disabled/greyed out) so the grid layout stays consistent and users can tell it's a scrollable area.

Affected

• Both Lite and Dashboard
• Any DataGrid that can be empty (e.g. before first collection, after filtering removes all rows)

[erikdarlingdata]

Investigation Report: Scrollbar Visibility

Root Cause

All DataGrids use ScrollViewer.VerticalScrollBarVisibility="Auto" (either explicitly or by WPF default). The global DataGrid style in both theme files has no ScrollBarVisibility properties set. With "Auto", WPF hides scrollbars when content doesn't need scrolling — including empty grids.

Scope

~23 DataGrids across both apps are affected.

Recommended Fix

Add two setters to the global DataGrid style in both theme files:

• Dashboard/Themes/DarkTheme.xaml (lines 612-626)
• Lite/Themes/DarkTheme.xaml (lines 569-583)

<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Visible"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Visible"/>

This makes scrollbars always present (greyed out when empty, functional when populated). Individual grids can still override to "Auto" if needed. Two-line change covers all 23 grids.