Initial focus for Get and Place Footprint.

Fixes https://gitlab.com/kicad/code/kicad/issues/10230

pcbnew/dialogs/dialog_get_footprint_by_name.h

@@ -50,6 +50,8 @@ public:
         // Hide help string until someone implements successive placement (#2227)
         m_multipleHint->Show( false );
 
+        SetInitialFocus( m_SearchTextCtrl );
+
         SetupStandardButtons();
 
         // Dialog should not shrink beyond it's minimal size.