Adapt to removed/deprecated code in TB 57/59

[lieser]

• "legacy" generators
• for (x in fixIterator(obj)) (removed due to removal of __iterator__) -- replacement: for (x of fixIterator(obj))
• date.toLocaleFormat date.toLocaleFormat is gone in current Thunderbird builds #94
• nsILocalFile nsILocalFile is gone in Thunderbird 57 #95
• nsIInputStreamPump.init stream position and length arguments to nsIInputStreamPump.init are gone as of Thunderbird 57 #96
• catch (ex if ex instanceof ExceptionType) (removed in mozilla47 already) conditional catch statements no longer supported? #99
• Warning: NetUtil.newChannel(uri) deprecated, please provide argument 'aWhatToLoad'
• imports must be 100% correct now: Components.utils.import("resource://gre/modules/...") for Mozilla central imports, Components.utils.import("resource:///modules/...") for Thunderbird imports
  • "resource://services-common/utils.js" ?
• String.trim is deprecated; use String.prototype.trim instead
• add Workaround for default preferences? https://bugzilla.mozilla.org/show_bug.cgi?id=1414398
  • fixed in Thunderbird
• add <em:optionsType> to install.rdf? will not be changed for now
• CSS for the preference dialogs

https://wiki.mozilla.org/Thunderbird/Add-ons_Guide_57