Fix special powers add-on for firefox.
version 1.0.21
Ensure that the errorWrapper is closed when a new document is opened (issue 4625)
Merge pull request #4628 from Snuffleupagus/issue-4625

Ensure that the errorWrapper is closed when a new document is opened (issue 4625)
Remove unused (local) variables in web/
Remove some unused variables from src/

Only obviously useless, local variables have been removed.
Merge pull request #4622 from yurydelendik/release1.0.21

version 1.0.21
Merge pull request #4607 from Rob--W/unused-vars-1

Remove a bunch of unused local variables from web/ and src/
Less copying in the JPX coder, merged and rebased
Prevent the annotationLayer to be recreated when the page is redrawn

This allows interactive annotations to keep their states after a resize
Merge pull request #4552 from dferer/annotations-refresh

Prevent the annotationLayer from being recreated when the page is redrawn
Merge pull request #4538 from fkaelberer/lessCopyingInJPX

Less copying in the JPX decoder
Fixes spacing in the text layer builder
Merge pull request #4633 from yurydelendik/tlspacing

Fixes spacing in the text layer builder
rename getUint32 to getInt32 and collect readInt*() in util.js
Fix #3483 and simplify readCodingpasses()
Merge pull request #4636 from fkaelberer/issue4553

Rename getUint32 to getInt32 and collect readInt*() in util.js
Use special powers quit in unit tests.
Call correct quit function and wait request sending.
Fixes webbrowser.js to avoid undefined callback call