Find and replace utility functions incorrectly.

[Chris--A]

A small bug has been identified in the find & replace utility within the IDE.
http://forum.arduino.cc/index.php?topic=243579.msg1746052

Entering text into the 'Replace with:' text box and hitting Replace will insert the text directly into the document. No text has to be entered into the 'Find' text box.

A simple fix may be to disable the replace button until something is found. The 'Replace All' button does not have the same error.

This has been tested in Arduino IDE versions 1.5.6-r2

[ffissore]

This has been fixed with cd75cc2 but issue was not closed