Use a wxSearchCtrl instead of wxTextCtrl for the symbol chooser window

This just makes it prettier with the search icon and cancel

common/widgets/lib_tree.cpp

@@ -30,6 +30,7 @@
 #include <wx/html/htmlwin.h>
 #include <tool/tool_interactive.h>
 #include <tool/tool_manager.h>
+#include <wx/srchctrl.h>
 #include <wx/settings.h>
 #include <wx/statbmp.h>
 
@@ -51,9 +52,11 @@ LIB_TREE::LIB_TREE( wxWindow* aParent, LIB_TABLE* aLibTable,
     {
         auto search_sizer = new wxBoxSizer( wxHORIZONTAL );
 
-        m_query_ctrl = new wxTextCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition,
+        m_query_ctrl = new wxSearchCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition,
                                        wxDefaultSize, wxTE_PROCESS_ENTER );
 
+        m_query_ctrl->ShowCancelButton( true );
+
 // Additional visual cue for GTK, which hides the placeholder text on focus
 #ifdef __WXGTK__
         auto bitmap = new wxStaticBitmap( this, wxID_ANY, wxArtProvider::GetBitmap( wxART_FIND, wxART_FRAME_ICON ) );

include/widgets/lib_tree.h

@@ -32,6 +32,7 @@ class wxDataViewCtrl;
 class wxTextCtrl;
 class wxHtmlWindow;
 class wxHtmlLinkEvent;
+class wxSearchCtrl;
 class ACTION_MENU;
 class LIB_ID;
 class LIB_TABLE;
@@ -171,7 +172,7 @@ protected:
 
     wxObjectDataPtr<LIB_TREE_MODEL_ADAPTER> m_adapter;
 
-    wxTextCtrl*      m_query_ctrl;
+    wxSearchCtrl*    m_query_ctrl;
     wxDataViewCtrl*  m_tree_ctrl;
     wxHtmlWindow*    m_details_ctrl;