pyqtwrapper: update some remaining scripts

scripts/generate_test_mask_image.py

@@ -8,7 +8,7 @@
 import os
 import sys
 import argparse
-from PyQt4.QtGui import QImage, QColor
+from PyQt.QtGui import QImage, QColor
 import struct
 import urllib2
 import glob

scripts/qgis_fixes/fix_pyqt.py

@@ -354,6 +354,7 @@ MAPPING = {
     "PyQt4.uic": [
         ("PyQt.uic", [
             "loadUiType",
+            "loadUi",
         ]),
     ],
     "PyQt4": [

scripts/widgets_tree.py

@@ -40,7 +40,7 @@ import sys
 import os
 import glob
 from PyQt.QtWidgets import QWidget, QDialog, QCheckBox, QComboBox, QDial, QPushButton, QLabel, QLCDNumber, QLineEdit, QRadioButton, QScrollBar, QSlider, QSpinBox, QTextEdit, QDateEdit, QTimeEdit, QDateTimeEdit, QListView, QProgressBar, QTableView, QTabWidget, QTextBrowser, QDialogButtonBox, QScrollArea, QGroupBox, QStackedWidget
-from PyQt4.uic import loadUi
+from PyQt.uic import loadUi
 from PyQt.QtXml import QDomDocument
 
 # qwt_plot is missing somehow but it may depend on installed packages

tests/src/python/utilities.py

@@ -19,7 +19,7 @@ import glob
 import platform
 import tempfile
 
-from PyQt4.QtCore import QDir
+from PyQt.QtCore import QDir
 
 from qgis.core import (
     QgsCoordinateReferenceSystem,