Fixing focus control

Source commit: c0e3607ac09958213bdb53c4c1eee94fa9171fcf

source/forms/Preferences.dfm

@@ -657,7 +657,7 @@ object PreferencesDialog: TPreferencesDialog
             Width = 96
             Height = 13
             Caption = '&Incremental search:'
-            FocusControl = FormatSizeBytesCombo
+            FocusControl = PanelSearchCombo
             OnClick = ControlChange
           end
           object ShowHiddenFilesCheck: TCheckBox