Fix #50: Ctrl+F highlights previous text
Fix #50: Ctrl+F highlights previous text

Opening the "find" or "replace" menu (Ctrl+F or Ctrl+H) highlights
any previous text in the textbox.  Undoes the solution to #44 since
it conflicts with this behavior.  The new behavior is consistent
with most other editors (e.g. Visual Studio).

vovkasm/liteide,vovkasm/liteide,scorredoira/liteide,visualfc/liteide,scorredoira/liteide,scorredoira/liteide,vovkasm/liteide,visualfc/liteide,visualfc/liteide,vovkasm/liteide,vovkasm/liteide,scorredoira/liteide,scorredoira/liteide,scorredoira/liteide,visualfc/liteide,visualfc/liteide,vovkasm/liteide,visualfc/liteide