Error when setting grid color to zero

[darrenan]

When typing in zero for the color in the grid color picker:

[10/28/2019 10:16:58 PM] [<color="red">ERROR</color>] UPDATE: System.NullReferenceException: Object reference not set to an instance of an object
at MLIHBHGKEHF.HLBOKHMLHNJ () [0x00047] in <a9c42264e27c4ed2acd02df850efda7f>:0
at MLIHBHGKEHF.IABENIAKGPL (UnityEngine.KeyCode NEGPFONAGCM, LANCEILPANJ FMOLGJCCGFF, System.Boolean INOFDHAOFIL) [0x001ab] in <a9c42264e27c4ed2acd02df850efda7f>:0
at FDPMHEGADHH.CIANKHAAMOP (UnityEngine.KeyCode NEGPFONAGCM) [0x00047] in <a9c42264e27c4ed2acd02df850efda7f>:0
at AFPAMENHNBE.HAIKOKGKCOC () [0x00162] in <a9c42264e27c4ed2acd02df850efda7f>:0
at FG.FGDesktop.NBMKCCHCGFG () [0x00018] in <a9c42264e27c4ed2acd02df850efda7f>:0
at FG.FGDesktop.Update () [0x00026] in <a9c42264e27c4ed2acd02df850efda7f>:0

[Moon Wizard]

This is actually caused by two issues:

1) The Color dialog does not grab keyboard focus from standard FG windows/controls. Filed as FGU-595
2) Pressing the Tab key in the ImageDataControl while there are no layers causes an exception. Filed as FGU-594.

Thanks,
JPG