Disambiguated the string "Invert" for Invert Effect Name.

data/effects/invert.xml

 <!DOCTYPE kpartgui>
 <effect tag="invert" id="invert">
-	<name>Invert</name>
+	<name context="Invert Effect Name">Invert</name>
 	<description>Invert colors</description>
 	<author>Charles Yates</author>
-</effect>
\ No newline at end of file
+</effect>