PPrefsDialog.ui adopted for Qt5.

src/musredit_qt5/musredit/forms/PPrefsDialog.ui

@@ -10,7 +10,7 @@
     <x>0</x>
     <y>0</y>
     <width>460</width>
-    <height>200</height>
+    <height>241</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -26,7 +26,7 @@
      <item>
       <widget class="QTabWidget" name="fTabWidget">
        <property name="currentIndex">
-        <number>0</number>
+        <number>3</number>
        </property>
        <widget class="QWidget" name="fGeneral_tab">
         <attribute name="title">
@@ -36,7 +36,7 @@
          <property name="geometry">
           <rect>
            <x>10</x>
-           <y>80</y>
+           <y>110</y>
            <width>421</width>
            <height>31</height>
           </rect>
@@ -45,13 +45,13 @@
           <string>Change Default Search Paths</string>
          </property>
         </widget>
-        <widget class="QWidget" name="">
+        <widget class="QWidget" name="layoutWidget">
          <property name="geometry">
           <rect>
            <x>10</x>
            <y>10</y>
            <width>416</width>
-           <height>61</height>
+           <height>79</height>
           </rect>
          </property>
          <layout class="QHBoxLayout" name="horizontalLayout_2">
@@ -201,6 +201,28 @@
           <string>yaml out</string>
          </property>
         </widget>
+        <widget class="QWidget" name="">
+         <property name="geometry">
+          <rect>
+           <x>10</x>
+           <y>100</y>
+           <width>251</width>
+           <height>25</height>
+          </rect>
+         </property>
+         <layout class="QHBoxLayout" name="horizontalLayout_4">
+          <item>
+           <widget class="QComboBox" name="fNumberOfThreads_comboBox"/>
+          </item>
+          <item>
+           <widget class="QLabel" name="fNumberOfThreads_label">
+            <property name="text">
+             <string># threads to be used</string>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </widget>
        </widget>
        <widget class="QWidget" name="fMusrview_tab">
         <attribute name="title">