Updated WInPlaceEdit to properly use contained WLineEdit

placeholder functionality; removed superfluous placeholder member

Author: skoehler47

src/Wt/WInPlaceEdit.C

@@ -103,16 +103,14 @@ void WInPlaceEdit::setText(const WString& text)
 
 void WInPlaceEdit::setPlaceholderText(const WString& text)
 {
-  placeholderText_ = text;
-
   edit_->setPlaceholderText(text);
   if (empty_)
     text_->setText(text);
 }
 
 const WString& WInPlaceEdit::placeholderText() const
 {
-  return placeholderText_;
+  return edit_->placeholderText();
 }
 
 void WInPlaceEdit::save()

src/Wt/WInPlaceEdit.h

@@ -166,7 +166,6 @@ class WT_API WInPlaceEdit : public WCompositeWidget
   WText *text_;
   WLineEdit *edit_;
   WPushButton *save_, *cancel_;
-  WString placeholderText_;
   Wt::Signals::connection c2_;
   bool empty_;
 };