Don't extract model if model is not loaded (playcanvas#1524)

Optimize image element creation. Reduces creation cost by ~25-30%. (p…

…laycanvas#1513)

* Optimize image element creation. Reduces creation cost by ~25-30%.
* Remove test that checks deleted texture coordinate data.

Merge.

[FIX] Do not scale lineHeight for text elements that do not have auto…

…Fit enabled (playcanvas#1486)

Auto fit text (playcanvas#1479)

MSDF font change to outline effect, it grow outwards only. (playcanva…

…s#1478)

Remove Apple specific fix for IBL

This changed caused other issues

[FIX] Prevent error when button or scrollview is deleted during updat…

…e loop (playcanvas#1463)

* [FIX] Prevent error when button or scrollview is deleted during update loop
* Replace individual bindings to static component system update with system-wide binding
* onUpdate now called for all buttons and scrollviews while enabled
* Add internal 'postinitialize' event to maintain EntityReference behaviour (todo: change this)

Merge pull request playcanvas#1461 from playcanvas/disable-bundles-wi…

…thout-textdecoder

Disable bundles if TextDecoder is not available

ComponentSystem doesn't fire events, it directly calls subscribers (p…

…laycanvas#1449)