Fix LT-21894: Show Import Phonology command only in Grammar area

[jtmaxwell3]

I also made the Export Phonology command only appear in the Grammar area. Unfortunately, this means that the Export Grammar Sketch commands have to only appear in the Grammar area, too.

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This change is 

[JakeOliver28]

Reviewable status: 0 of 7 files reviewed, 1 unresolved discussion (waiting on @jtmaxwell3)

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Src/xWorks/FwXWindow.cs line 1941 at r1 (raw file):

			{
				display.Enabled = true;
				display.Visible = true;

Could we set display.Enabled = area == "grammar" and also get rid of display.Enabled = false at the beginning of the method?

[JakeOliver28]

Reviewable status: 0 of 7 files reviewed, 1 unresolved discussion (waiting on @jtmaxwell3)

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Src/xWorks/FwXWindow.cs line 1941 at r1 (raw file):

Previously, JakeOliver28 (Jake Oliver) wrote…

Could we set display.Enabled = area == "grammar" and also get rid of display.Enabled = false at the beginning of the method?

The same goes for display.Visible

[JakeOliver28]

Reviewable status: 0 of 7 files reviewed, 1 unresolved discussion (waiting on @jtmaxwell3)