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IE does not realize that when a pattern changes, objects painted with
said pattern need to be rerendered.

Firefox on Windows is off by a pixel.

This allows fields and inputs to be deprecated.

No functional change.

Output tabs are negative coordinates.

Add window scope for getSelection.

There is no global "getSelection()" function, see:
https://developer.mozilla.org/en-US/docs/Web/API/Window/getSelection

https://groups.google.com/forum/#!topic/blockly/2q0pleoMIco

No functional change.

fix: https://github.com/google/blockly/issues/161

Revert DOM injection order of the zoom control images.