Add quick toggle to expanded scripture pane to show raw USFM

[PhotoNomad0]

Story Explanation

User Story

Suggested by Larry at January meeting. Larry reviewed the prototype.

Added toggle button to title bar to switch to show raw USFM.

Regular view:

Normal view:

Features / Specifications

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Definition of Done

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Additional Context

Mockups

[elsylambert]

@PhotoNomad0 The toggle state is not persistent when the expanded scripture pane is closed. Is it designed that way? If so, I will write up a separate issue for this.

[PhotoNomad0]

@elsylambert I have not had a user request for that feature.

[elsylambert]

translationCore 3.2.0 (ae2304b). USFM formatting fails when selection is made.
In tW, the new line added is not shown in the expanded Scripture view.

[PhotoNomad0]

@elsylambert Try again in latest build.

[elsylambert]

Works fine in translationCore 3.2.0 (1ed3822). Not seeing formatting issues. Toggle works well for the USFM view.