Added new 4 xml UI for hiding some audio effects

data/effects/audiolevel.xml

+<!DOCTYPE kpartgui>
+<effect tag="audiolevel" id="audiolevel" type="hidden">
+	<name>Audio levels</name>
+	<description>Compute the audio amplitude.</description>
+	<author>Dan Dennedy, Marco Gittler, and Steve Harris</author>
+    <parameter type="bool" name="iec_scale" default="1" />
+		<name>Use IEC 60268-18 Scale </name>
+	</parameter>
+</effect>

data/effects/sox/sox.xml

+<!DOCTYPE kpartgui>
+<effect tag="sox" id="sox" type="hidden">
+	<name>SoX</name>
+	<description>Process audio using a SoX effect</description>
+	<author>Dan Dennedy</author>
+	<parameter type="list" name="effect" default="analysis" paramlist="analysis;apply">
+         <paramlistdisplay>Analysis,Apply</paramlistdisplay>
+		<name>Effect</name>
+	</parameter>
+        <parameter type="constant" name="analysis_level" max="1" min="-60" default="-12" decimals="1" suffix="dB">
+		<name>Normalization level </name>
+	</parameter>
+    <parameter type="constant" name="gain" max="24" min="-60" default="0" decimals="1" suffix="dB">
+		<name>Gain to normalize</name>
+	</parameter>
+    <parameter type="bool" name="use_peak" default="0">
+		<name>Use peak</name>
+	</parameter>
+    <parameter type="bool" name="normalise" default="0">
+		<name>Dynamic normalization</name>
+	</parameter>
+        <parameter type="constant" name="window" max="1000" min="0" default="75">
+		<name>Smoothing window size </name>
+	</parameter>
+        <parameter type="constant" name="max_gain" max="20" min="0" default="10" decimals="2" suffix="dB">
+		<name>Maximum gain</name>
+	</parameter>
+</effect>
+

data/effects/sox/sox_pitch.xml

 <!DOCTYPE kpartgui>
-<effect tag="sox" id="sox_pitch" type="audio">
+<effect tag="sox" id="sox_pitch" type="hidden">
 	<name>Sox Pitch Shift</name>
 	<description>Sox change pitch audio effect</description>
 	<author>http://sox.sourceforge.net</author>

data/effects/sox/sox_reverb.xml

 <!DOCTYPE kpartgui>
-<effect tag="sox" id="sox_reverb" type="audio">
+<effect tag="sox" id="sox_reverb" type="hidden">
 	<name>Sox Reverb</name>
 	<description>Sox reverb audio effect</description>
 	<author>http://sox.sourceforge.net</author>