Themes (via KryptonManager design option) should have option to resepect Current Metrics for Form Border widths

[Smurf-IV]

This is where that property is

[DllImport("user32.dll")]
static extern int GetSystemMetrics(92);

CXPADDEDBORDER = 92, // 0x5C

Originally posted by @lorinkundert in #114 (comment)

Other values to consider:
https://pinvoke.net/default.aspx/Enums/SystemMetric.html

/// <summary>
        /// The width of a window border, in pixels. This is equivalent to the SM_CXEDGE value for windows with the 3-D look.
        /// </summary>
        SM_CXBORDER = 5,
/// <summary>
        /// This value is the same as SM_CXFIXEDFRAME.
        /// </summary>
        SM_CXDLGFRAME = 7,
/// <summary>
        /// The width of a 3-D border, in pixels. This metric is the 3-D counterpart of SM_CXBORDER.
        /// </summary>
        SM_CXEDGE = 45,

        /// <summary>
        /// The thickness of the frame around the perimeter of a window that has a caption but is not sizable, in pixels.
        /// SM_CXFIXEDFRAME is the height of the horizontal border, and SM_CYFIXEDFRAME is the width of the vertical border.
        /// This value is the same as SM_CXDLGFRAME.
        /// </summary>
        SM_CXFIXEDFRAME = 7,

[Smurf-IV]