Add pref to show switch button only for IE engine.
UI for Prefs.showUrlBarButtonOnlyForIE.
Fix scoping issue when passing objects to plugin code.
Use derived bindings to fix the "missing OK/Cancel buttons" bug.

Instead of toggling "instantApply" global preference, we create a
derived "prefwindow" that always thinks that the "instantApply"
preference is false.
Add support for Adblock Plus (Pale Moon Pseudo-Static).
Version 0.4.1a for babelzilla.
Fix privateCookieSyncEnabled checkbox disabled state issue.
Update tldstring.txt
Update translations.
Version 0.4.1b