reduce size of units calculator

src/Gui/DlgUnitsCalculator.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>645</width>
-    <height>375</height>
+    <width>424</width>
+    <height>262</height>
    </rect>
   </property>
   <property name="windowTitle">

src/Gui/DlgUnitsCalculatorImp.cpp

@@ -66,7 +66,6 @@ DlgUnitsCalculator::DlgUnitsCalculator( QWidget* parent, Qt::WindowFlags fl )
     connect(ui->pushButton_Copy, SIGNAL(clicked()), this, SLOT(copy()));
 
     connect(ui->ValueInput, SIGNAL(parseError(QString)), this, SLOT(parseError(QString)));
-    connect(ui->UnitInput, SIGNAL(parseError(QString)), this, SLOT(parseError(QString)));
 
     ui->ValueInput->setParamGrpPath(QByteArray("User parameter:BaseApp/History/UnitsCalculator"));
     // set a default that also illustrates how the dialog works