[Spot Remover effect] Add xml ui to fix initalization (and other minor

issues)

Fixes #1212

data/effects/CMakeLists.txt

@@ -61,6 +61,7 @@ scratchlines.xml
 sepia.xml
 shape.xml
 speed.xml
+spot_remover.xml
 swapchannels.xml
 tcolor.xml
 threshold.xml

data/effects/spot_remover.xml

+<!DOCTYPE kpartgui>
+<effect tag="spot_remover" id="spot_remover">
+	<name>Spot Remover</name>
+	<description>Replace an area with interpolated pixels. The new pixel values are interpolated from the nearest pixels immediately outside of the specified area.</description>
+	<author>Meltytech, LLC</author>
+        <parameter type="animatedrect" name="rect" default="0 0 100% 100%" opacity="false">
+		<name>Rectangle</name>
+		<comment>Defines the rectangle of the area that will be removed.</comment>
+        </parameter>
+</effect>
+

[Davy Bartoloni]

can this fix also : #1326 ?