PrefCompletionUi.ui: change label and add tooltip for word length settings

as discussed on the list with Richard

src/frontends/qt4/ui/PrefCompletionUi.ui

@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>PrefCompletionUi</class>
  <widget class="QWidget" name="PrefCompletionUi">
@@ -28,12 +29,12 @@
       <bool>true</bool>
      </property>
      <layout class="QVBoxLayout">
-      <property name="margin" >
-       <number>9</number>
-      </property>
       <property name="spacing">
        <number>6</number>
       </property>
+      <property name="margin">
+       <number>9</number>
+      </property>
       <item>
        <widget class="QCheckBox" name="inlineMathCB">
         <property name="toolTip">
@@ -73,12 +74,12 @@
       <bool>true</bool>
      </property>
      <layout class="QVBoxLayout">
-      <property name="margin" >
-       <number>9</number>
-      </property>
       <property name="spacing">
        <number>6</number>
       </property>
+      <property name="margin">
+       <number>9</number>
+      </property>
       <item>
        <widget class="QCheckBox" name="inlineTextCB">
         <property name="toolTip">
@@ -121,20 +122,20 @@
       <bool>true</bool>
      </property>
      <layout class="QVBoxLayout">
+      <property name="spacing">
+       <number>6</number>
+      </property>
       <property name="margin">
        <number>9</number>
       </property>
-      <property name="spacing" >
-       <number>6</number>
-      </property>
       <item>
        <layout class="QHBoxLayout">
-        <property name="margin" >
-         <number>0</number>
-        </property>
         <property name="spacing">
          <number>6</number>
         </property>
+        <property name="margin">
+         <number>0</number>
+        </property>
         <item>
          <widget class="QDoubleSpinBox" name="inlineDelaySB">
           <property name="toolTip">
@@ -163,7 +164,7 @@
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
           </property>
-          <property name="sizeHint" >
+          <property name="sizeHint" stdset="0">
            <size>
             <width>40</width>
             <height>20</height>
@@ -175,12 +176,12 @@
       </item>
       <item>
        <layout class="QHBoxLayout">
-        <property name="margin" >
-         <number>0</number>
-        </property>
         <property name="spacing">
          <number>6</number>
         </property>
+        <property name="margin">
+         <number>0</number>
+        </property>
         <item>
          <widget class="QDoubleSpinBox" name="popupDelaySB">
           <property name="toolTip">
@@ -209,7 +210,7 @@
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
           </property>
-          <property name="sizeHint" >
+          <property name="sizeHint" stdset="0">
            <size>
             <width>40</width>
             <height>20</height>
@@ -221,16 +222,16 @@
       </item>
       <item>
        <layout class="QHBoxLayout">
-        <property name="margin" >
-         <number>0</number>
-        </property>
         <property name="spacing">
          <number>6</number>
         </property>
+        <property name="margin">
+         <number>0</number>
+        </property>
         <item>
          <widget class="QSpinBox" name="minlengthSB">
           <property name="toolTip">
-           <string>.</string>
+           <string>Words with less than the specified number of characters will not be completed.</string>
           </property>
           <property name="minimum">
            <number>5</number>
@@ -246,7 +247,7 @@
         <item>
          <widget class="QLabel" name="label_5">
           <property name="text">
-           <string>Minimum word length for completion</string>
+           <string>Minimum characters for words that should be completed</string>
           </property>
           <property name="buddy">
            <cstring>minlengthSB</cstring>
@@ -258,7 +259,7 @@
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
           </property>
-          <property name="sizeHint" >
+          <property name="sizeHint" stdset="0">
            <size>
             <width>40</width>
             <height>20</height>
@@ -281,10 +282,10 @@
       <item>
        <widget class="QCheckBox" name="inlineDotsCB">
         <property name="toolTip">
-         <string>Long completions are cut-off and shown with "...".</string>
+         <string>Long completions are cut-off and shown with &quot;...&quot;.</string>
         </property>
         <property name="text">
-         <string>&amp;Use "..." to shorten long completions</string>
+         <string>&amp;Use &quot;...&quot; to shorten long completions</string>
         </property>
        </widget>
       </item>
@@ -299,7 +300,7 @@
      <property name="sizeType">
       <enum>QSizePolicy::Expanding</enum>
      </property>
-     <property name="sizeHint" >
+     <property name="sizeHint" stdset="0">
       <size>
        <width>0</width>
        <height>16</height>