Checked all Search boxes and made them compliant with UX specs.

Code/Framework/AzQtComponents/AzQtComponents/Components/FilteredSearchWidget.cpp

@@ -180,6 +180,8 @@ namespace AzQtComponents
         textSearch->setFrame(false);
         textSearch->setText(QString());
         textSearch->setPlaceholderText(QObject::tr("Search..."));
+        textSearch->setClearButtonEnabled(true);
+        LineEdit::applySearchStyle(textSearch);
         connect(textSearch, &QLineEdit::textChanged, this, &SearchTypeSelector::FilterTextChanged);
 
         m_searchLayout->addWidget(textSearch);

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/EntityPropertyEditor.cpp

@@ -335,6 +335,7 @@ namespace AzToolsFramework
         m_gui->m_entityDetailsLabel->setObjectName("LabelEntityDetails");
         m_gui->m_entitySearchBox->setReadOnly(false);
         m_gui->m_entitySearchBox->setContextMenuPolicy(Qt::CustomContextMenu);
+        m_gui->m_entitySearchBox->setClearButtonEnabled(true);
         AzQtComponents::LineEdit::applySearchStyle(m_gui->m_entitySearchBox);
 
         AzFramework::ApplicationRequests::Bus::BroadcastResult(