Same material was defined twice in the same scope.

axis hiding.

Replaced magic numbers with vars in TransformControls. Removed radial rotation gesture (now linear only).

Fixes #10916, #9312, #5489 and #5379

Fixed rotation at negative scale.

Merged TransformControls into one file and updated examples.

Added rotation snapping in local and world mode.

Cleaning up transform controls math and variables.

Improved rotation interactions with radial and linear mode
depending on facing angle. Fixes #13806 and #7947.

Added auto-hiding for axis facing camera. Fixes #11340

Improved scaling interactions. Fixes #10916, #9312, #5489 and #5379

In my case for example I have a listener to the mousedown event. In this listener I check for the current set axis. But of course it is ```null``` because it is set just after the event was triggered.
So my suggestion is to set the axis and AFTERWARDS trigger the event.

* fixed a bug

if TouchEvent is not defined in the browser,an exception will be thrown,cause else branch statements not to be executed.

* fixed a bug

Check whether 'TouchEvent' is defined in the browser.

* trims extra spaces

- Resulting issues: #29, #30
- Player behaviour where the player stops when a command is executed,
undone or redone removed.