WebUI: Catch potential undefined error when attempting to disable a plugin
Fix #2125
Clean up some json api code.
Fix issues with js eventmanager. refs #2046
Fix plugin methods not being available when enabled until refresh. refs #2125
Fix WebUI submenus closing upon mouse click
Update translation files from launchpad
Update Changelog, webui gettext, gitignore & compress js
Fix error when loading torrent through IPC

Fix bug from commit 0045ec0cf1e48: missing args attribute error when
loading torrent through IPC on non-windows.
Fix #2240 : Win32 freespace issue with large capacity drives
Fix Gtk addtorrentdialog parent None error for single file torrents
Fix mapped_files error in AddTorrentDialog