GUI enhancement for line number widget in editors tool bar

The L of "Line ..." and the right frame of the previous combo box are
glued together without any spacing which looks not good. Added half
spacing to save space and make the label good looking.

Change-Id: Id930171be7a2f7885ab633eec8082057bc726227
Reviewed-by: David Schulz <david.schulz@digia.com>

src/plugins/texteditor/basetexteditor.cpp

@@ -6250,6 +6250,8 @@ BaseTextEditor::BaseTextEditor(BaseTextEditorWidget *editor)
     aggregate->add(editor);
 
     m_cursorPositionLabel = new Utils::LineColumnLabel;
+    const int spacing = editor->style()->pixelMetric(QStyle::PM_LayoutHorizontalSpacing) / 2;
+    m_cursorPositionLabel->setContentsMargins(spacing, 0, spacing, 0);
 
     m_stretchWidget = new QWidget;
     m_stretchWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);