Added missing preferences focus handlers

[grliszas14]

Added missing preferences focus handlers (so it auto scrolls when using navigation).
Fixed Import->MEI navigation section (it wasn't possible to navigate to it)

• I signed the CLA
• The title of the PR describes the problem it addresses
• Each commit's message describes its purpose and effects, and references the issue it resolves
• If changes are extensive, there is a sequence of easily reviewable commits
• The code in the PR follows the coding rules
• There are no unnecessary changes
• The code compiles and runs on my machine, preferably after each commit individually
• I created a unit test or vtest to verify the changes I made (if applicable)

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: 1bc10cd1-b226-4693-98f2-b3899562da1e

📥 Commits

Reviewing files that changed from the base of the PR and between 4e25547 and cc01ca1.

📒 Files selected for processing (12)

• src/preferences/qml/MuseScore/Preferences/AdvancedPreferencesPage.qml
• src/preferences/qml/MuseScore/Preferences/AudioMidiPreferencesPage.qml
• src/preferences/qml/MuseScore/Preferences/BraillePreferencesPage.qml
• src/preferences/qml/MuseScore/Preferences/CanvasPreferencesPage.qml
• src/preferences/qml/MuseScore/Preferences/FoldersPreferencesPage.qml
• src/preferences/qml/MuseScore/Preferences/GeneralPreferencesPage.qml
• src/preferences/qml/MuseScore/Preferences/ImportPreferencesPage.qml
• src/preferences/qml/MuseScore/Preferences/NoteInputPreferencesPage.qml
• src/preferences/qml/MuseScore/Preferences/PercussionPreferencesPage.qml
• src/preferences/qml/MuseScore/Preferences/SaveAndPublishPreferencesPage.qml
• src/preferences/qml/MuseScore/Preferences/ScorePreferencesPage.qml
• src/preferences/qml/MuseScore/Preferences/UpdatePreferencesPage.qml

---

📝 Walkthrough

Walkthrough

Multiple preference page QML files were updated to add focus-driven visibility behavior. Specifically, onFocusChanged handlers were added to various preference section components across eleven preference pages. When a section gains focus, these handlers call root.ensureContentVisibleRequested() with the section's geometry to request parent-level scrolling or visibility management. Additionally, ImportPreferencesPage.qml adds navigation metadata to MeiSection and updates MnxSection's navigation order.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main objective of the changeset: adding missing focus handlers to preferences pages for auto-scroll functionality during navigation.
Description check	✅ Passed	The PR description provides context for the changes, explains the motivation (auto-scrolling during navigation), addresses both issues (focus handlers and MEI navigation fix), and includes a completed checklist. Most required template items are satisfied.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}