LT-22161: Show approval source in parsing development mode

[jtmaxwell3]

This implements https://jira.sil.org/browse/LT-22161. Beth agreed to this in the last comment.

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This change is 

[jasonleenaylor]

Src/LexText/Interlinear/InterlinVc.cs line 884 at r1 (raw file):

			vwenv.set_IntProperty((int)FwTextPropType.ktptBorderLeading, (int)FwTextPropVar.ktpvMilliPoint, width);
			vwenv.set_IntProperty((int)FwTextPropType.ktptBorderTrailing, (int)FwTextPropVar.ktpvMilliPoint, width);
			vwenv.set_IntProperty((int)FwTextPropType.ktptBorderColor, (int)FwTextPropVar.ktpvDefault, color);

So this will always set a border color, but it won't be visible unless we are in parsingdevmode. Does it disappear if we switch out of dev mode? (I'm not sure if the vwenv is reused or recreated)

[jtmaxwell3]

It disappears if you switch out of dev mode because InterlinVc gets refreshed whenever the mode changes. This is in the acceptance test.

[jasonleenaylor]

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