POI: hide Attributes for local geometry; All Tags header tap targets

[tordans]

Problem

This changes two things at once because I mixed up my instructions. But they are related, so maybe they can stay in one PR.

Hide Attributes for local / new geometry

Issue 1: The 3rd tab "Attributes" was hidden for new nodes but not for new ways/areas

POITabBarController restores UserPrefs.poiTabIndex when the POI editor opens (0 = Common Tags, 1 = All Tags, 2 = Attributes).

For a new standalone node (selectedPrimary == nil), the Attributes tab is already removed and a saved index of 2 is clamped to 0.

For a new way / area / relation in memory (ident < 0 until upload), selectedPrimary is non-nil, so Attributes used to stay visible and index 2 could still be restored—inconsistent with the new-node experience.

User story: After editing an uploaded object on Attributes, opening the editor for any not-yet-uploaded geometry (nil selection or local negative id) should match a new node: only Common Tags and All Tags; Attributes returns after the object has a positive server id.

Consolidation: PR #6 addressed the same Attributes-tab bug. This PR keeps that fix plus the All Tags header work below. PR #6 is closed as superseded; unit tests from #6 are included here (POITabBarControllerTestCase).

All Tags preset header

Issue 2a: The "change/choose preset" arrow on the "All Tags" did not look that great
Issue 2b: When the keyboard was up (which happens automatically in some flows), there is no direct way to change from "All Tags" to "Common Tags" => This is now solved by making the Preset label clickable

On All Tags, the section header shows the matched preset name and a control to open the feature picker. When the keyboard hides the tab bar, users could not easily return to Common Tags preset fields. The trailing control was plain ">" text.

User story: Tap the preset title → Common Tags; tap the chevron → change preset (unchanged behavior).

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Implementation notes (Cursor)

POITabBarController.swift

• shouldHideAttributesTab(for:) — true when selection == nil or ident < 0.
• resolvedTabBar(savedIndex:selection:) — tab count 2 vs 3; clamps saved index 2 → 0 when Attributes hidden.
• viewDidLoad uses resolvedTabBar; removeAttributesTabFromViewControllers() strips the Attributes nav stack.

POIAllTagsViewController.swift (SectionHeaderCell)

• Title: slideTabTo(tabIndex: 0) + updates poiTabIndex; does not open feature picker.
• Trailing: chevron.right, accessibility “Change preset”; pushes POIFeaturePickerViewController.
• UIButton.Configuration on iOS 15+; fallback on older OS.

Tests (from PR #6)

• POITabBarControllerTestCase — matrix for savedIndex ∈ {0,1,2} × {nil, pending node, uploaded node, pending way}.

Out of scope: Refreshing tabs if selection goes pending → uploaded while POI stays open.

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Testing notes (@tordans)

POI tab / Attributes visibility

1. Uploaded node → Attributes → then new node (pushpin) → two tabs only; if last index was 2, land on Common Tags.
2. Same with last session on Attributes (index 2) before new node → Common Tags, no Attributes.
3. New way/area (ident < 0) → POI → Attributes hidden; index 2 does not select a missing third tab.
4. After upload or existing object (ident > 0) → three tabs; index 2 restores normally.

All Tags header

1. Tags present → All Tags → keyboard up → tap header title → Common Tags.
2. Tap chevron → feature picker; title must not open picker.
3. VoiceOver: two elements; “Change preset” on chevron.
4. iPad / Mac Catalyst: trailing control ≥ 44pt.

Before	After
tags-panels--hide-attributes--switcher--before.min.mov	tags-panels--hide-attributes--switcher--after.min.mov

Automated: Run GoMapTests — POITabBarControllerTestCase.