Improve map screen UX: toggle button, title fix, configurable data overlay

[cagnulein]

Summary

Based on testing feedback from Maksim Savrilov (thread "HR zones tile and graph, disussion"):

• The map icon in the toolbar now acts as a toggle: tap once to open the map, tap again to close it and go back to the tiles, instead of relying on the shared back/drawer button which was confusing to use as an exit from the map screen.
• Fixed the toolbar title overlapping the map icon on narrow (phone) screens.
• Removed the dead "Close" button in GoogleMap.qml — it was never actually wired to close the map (the popupclose signal had no listener), and would likely have been hidden behind the WebView layer on mobile anyway.
• The resizable data box shown on the map screen now respects the same tile visibility switches already used by the main tiles grid (Settings → Tiles): tile_speed_enabled, tile_cadence_enabled, tile_heart_enabled, tile_calories_enabled, tile_odometer_enabled, tile_watt_enabled, tile_elapsed_enabled, tile_inclination_enabled, tile_resistance_enabled, tile_elevation_enabled (also used for the Altitude line, since there's no dedicated altitude tile). No new settings were introduced. The box itself was already resizable (drag the bottom-right handle) with auto-fitting font size.

Test plan

• Open a GPX/live workout, tap the map icon: map opens; tap it again: map closes and returns to tiles.
• Verify the toolbar title no longer overlaps the map icon on a phone-sized window.
• In Settings → Tiles, disable a few tiles (e.g. keep only Watt and Heart Rate enabled) and confirm only those appear in the map's data box.
• Confirm the data box is still resizable via the corner handle and the font still auto-fits.

🤖 Generated with Claude Code

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.