Set view-option defaults and retire five toggles (#386)

[alex-rawlings-yyc]

Closes #386.

Continuous scroll now starts off. Show morphology starts on, except in Platform.Bible's simple interface mode or when the mode can't be read. Show free translation starts on only when the analysis already holds a free translation. That check uses the analysis as it was loaded, so clearing the last translation mid-session doesn't hide its input. In the Paratext 9 import view, the view options wait for the import's analysis to load. Each setting is still saved per project, which covers the issue's request to keep changes between sessions.

Show morphology and Show free translation ship with an 'auto' default. That lets the view tell a setting the user never chose from one they turned off, and pick the default from context. A null default isn't an option because the C# project data provider throws on it. Resetting either setting returns it to 'auto' and the view to its default. Platform.Bible's Project Settings dialog picks each control from the stored value's type, so it shows auto in a text box until the setting is first chosen. It already shows True/False text boxes for any of our toggles Paratext has stored.

Five toggles are gone, each fixed at the value the issue gives. The verse gutter always shows, phrase controls show on every phrase, and suggestions always show. Link buttons show only within the active segment, so the disabled-link tooltip at a segment boundary is gone too. The wheel scrolls the strip freely: the wheel mode that stepped the focus is deleted, and the Scroll to focused phrase button always shows.

With the gutter always on, segment cards still mark any verse that starts partway through the card inline, such as verse 3 in a merged 2–3 card. The gutter gives a card's range but not where each verse begins in it. The gutter is no longer hidden from screen readers, since it is now the only place a card's first verse number appears.

user-questions.md drops the questions this settles: the Show suggestions demo toggle and the choice of wheel mode.

Checked in the running app.

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[jasonleenaylor]

LGTM

This review was assisted by Claude Opus 5.5.

[jasonleenaylor]

Rebase verified, LGTM

This review was assisted by Claude Opus 5.5.