viewertexteditor: shifted code to class [skip ci]

Minor code organization

app/widget/viewer/viewerdisplay.cpp

@@ -344,8 +344,6 @@ void ViewerDisplayWidget::mouseDoubleClickEvent(QMouseEvent *event)
           text_edit->setGeometry(transformed_geom.toRect());
 
           ViewerTextEditorToolBar *toolbar = new ViewerTextEditorToolBar(this);
-          toolbar->setWindowFlags(Qt::Tool | Qt::FramelessWindowHint);
-          toolbar->resize(toolbar->sizeHint());
 
           QPoint pos = mapToGlobal(QPoint(transformed_geom.x(), transformed_geom.y() - toolbar->height()));
           for (QScreen *screen : qApp->screens()) {

app/widget/viewer/viewertexteditor.cpp

@@ -321,7 +321,7 @@ void ViewerTextEditor::DocumentChanged()
 }
 
 ViewerTextEditorToolBar::ViewerTextEditorToolBar(QWidget *parent) :
-  QWidget(parent),
+  QWidget(parent, Qt::Tool | Qt::FramelessWindowHint),
   painted_(false)
 {
   QVBoxLayout *outer_layout = new QVBoxLayout(this);
@@ -449,6 +449,8 @@ ViewerTextEditorToolBar::ViewerTextEditorToolBar(QWidget *parent) :
   advanced_layout->addStretch();
 
   setAutoFillBackground(true);
+
+  resize(sizeHint());
 }
 
 void ViewerTextEditorToolBar::SetAlignment(Qt::Alignment a)