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Fix #1338219 [Tolino Shine SW Rev. 1.4.5 requires ebooks in directory Books](https://bugs.launchpad.net/calibre/+bug/1338219)
Update the GUI section of the User Manual
Add translated Quick Start Guides in French and German
Edit Book: Add buttons to change the text alignment of the current paragraph. If you do not see them, go to Preferences->Toolbars and add them to the Text formatting actions toolbar.
Port compiling of .ui forms
Port imports
Port build script for building PyQt extensions to PyQt5
Port the progress indicator extension to PyQt5
Allow controlling PyQt5 import path via the env var PYQT5_IMPORT_PATH
faster builds
Get rid of the PyQt4 string from everywhere
Port: setMargin() reset() QStringList()

setMargin(): QLayout no longer has a setMargin() function, replace with
setContentsMargins()

reset(): QAbstractListModel no longer has reset(), replace with
beginResetModel(), endResetModel()

QStringList: No longer exists, a simply python list of strings works
instead
Fix mouse wheel not working in diff view
Port coffeescript compiler
Add note about headless Qt QPA plugin
Port WebKit imports and QChar

WebKit has been split up into QtWebKit and QtWebKitWidgets. Change
imports accordingly.

Replace use of QChar since it no longer exists in PyQt5
Port syntax highlighters
note about creating import checker