Improve the UX of profile editing and management

[keeshux]

Restart from the v2 flow most users are familiar with.

• Restore the global v2 accent
• Restore the per-profile toggles
• Single tap to edit a profile
• Reuse the same chevron for profile and module navigation
• Improve the iCloud/TV section and rename it to "Synchronization"
• Drop the misleading moon icon from the "Keep alive on sleep" toggle
• Drop the marginal "Enable"/"Disable" action from context menus
• Drop the grid cell highlighting, now marginal with toggles
• Drop the complexity of nextProfileId

Ultimately, rework TunnelToggleButton into TunnelToggle for better reuse across all platforms.

Things left to improve:

• The duplication of the active profile on top has not changed, but the toggles may make it more visually apparent
• The "Inactive" subtitle in disabled profiles is there for balance as it keeps rows and cells of the same height, but it serves no real purpose
• Access to secondary actions (e.g. provider server, credentials)
• Use of TipKit for less intuitive flows (e.g. context menus, building a profile from scratch)

Fixes #1111