Make DmsBrowser toolbar area height dynamic

[jochenwezel]

Summary

The right-side toolbar area in the DMS Browser dialog currently reserves a static height so that all possible toolbars and icons fit when features are enabled. This leaves unnecessary vertical whitespace when features/toolbars are disabled, and the file list below starts lower than needed.

Current behavior

In CompuMaster.Dms.BrowserUI/DmsBrowser.Designer.vb:

• SplitContainer.Panel2 contains FlowLayoutPanel1 and ListViewDmsFiles.
• FlowLayoutPanel1 contains the file action, sharing, folder sharing, and properties/refresh toolbars.
• ListViewDmsFiles.Dock = DockStyle.Fill, but its initial layout starts below a statically sized toolbar area (Location currently around Y = 92).
• Feature toggles change visibility/enabled state of toolbars/buttons, but the reserved top area does not shrink/grow based on the visible toolbars.

Desired behavior

The file-list toolbar area should size itself dynamically based on the currently visible toolbars and enabled features:

• Compute or let WinForms auto-size the toolbar host height from visible ToolStrip controls.
• When sharing actions are disabled or unavailable, hidden toolbars should not reserve vertical space.
• ListViewDmsFiles should remain correctly docked directly below the visible toolbar area.
• The layout should remain correct when AllowedActions, BrowseMode, or provider capabilities such as SupportsSharingSetup change visibility.
• Resizing the dialog should not reintroduce gaps or overlap.

Possible implementation notes

• Replace the static toolbar/list positioning with a layout container, e.g. a top-docked auto-sized toolbar panel plus fill-docked list view.
• Consider FlowLayoutPanel.AutoSize = True, AutoSizeMode = GrowAndShrink, Dock = Top, and ListViewDmsFiles.Dock = Fill.
• After changing toolbar visibility, trigger layout recalculation (PerformLayout) if needed.
• Keep the designer maintainable and avoid relying on magic Y coordinates.

Acceptance criteria

• With minimal features enabled, the file list starts immediately below the visible toolbar row(s), without the current blank reserved space.
• With all relevant features enabled, all toolbar buttons still fit and wrap/display as before.
• Feature/provider visibility changes update the toolbar area height correctly.
• No overlap between toolbars and file list at common dialog sizes.
• Add/update BrowserUI smoke tests where practical to verify toolbar visibility/layout properties.

[jochenwezel]

Additional scope note: while reworking the dynamic toolbar height, also review the toolbar icon sizes and source/rendering quality. The current ToolStrip.ImageScalingSize values appear to be around 19x19/20x20; verify whether these are ideal for WinForms/Windows DPI scaling or whether 16x16, 20x20, 24x24, or DPI-aware sizing would provide sharper toolbar icons. Acceptance should include that toolbar icons are not visibly blurred/downscaled and that any chosen icon size is reflected correctly in the computed toolbar height.