Initial focus for Get and Place Footprint.

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

(cherry picked from commit 714c65275c)

pcbnew/dialogs/dialog_get_footprint_by_name.h

@@ -51,6 +51,8 @@ public:
         // Hide help string until someone implements successive placement (#2227)
         m_multipleHint->Show( false );
 
+        SetInitialFocus( m_SearchTextCtrl );
+
         // Dialog should not shrink beyond it's minimal size.
         GetSizer()->SetSizeHints( this );
     }