3.4

Some highlights (See #1449 for more details):

• Improve Metal performance and stability on older devices.
• Process layout outside of scene locking to improve responsiveness when many layout objects are active
• Allow layout processing to be canceled by controller shutdown
• Fix iOS texture allocation problems for large (>2k x 2k) textures
• Fix some memory leaks on Android
• Add selection support for linear vectors on Android
• Fix some buffer overflows that could lead to random heap corruption
• Fix a bug in vector tessellation that, most noticeably, caused California to be truncated at levels 0-2.
• Add support for fading uniquely-identified layout objects in and out as they are added and removed
• Add support for co-located markers and labels, specifically for highway shields
• Add support for alternate representations, e.g., selected and non-selected, for rapid updates without removing and re-creating objects.
• Fix a bug that caused incorrect display of 3D Linear Shape objects on Android
• Add support for custom zoom transitions and change the default to make zooms seem more linear
• Add support for Mac Catalyst builds and add simple mousewheel support
• Add a devRelease build variant for profiling, etc., without having to deal with signing
• Allow for considering a constrained portion of the view when calculating the height needed to view a feature.

Resources are the same as 3.3.