Create tbl_find_replace.php

"Find and Replace" feature....
-Browse a table and click on change button at the bottom of the table. 
-or click on edit button at a row "Find and Replace" form are at those locations.. 


Changes:
-Added a form for the input from user at the bottom of "tbl_change.php" file.
-Added a new file "tbl_find_replace.php" to be used as the action of the form.

Not implemeted:
-User confirmation before executing the query.


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