ACME-1256 : Rename and cleanup in the default filters

indra/newview/app_settings/filters/VividYellowV.xml

-<llsd>
-    <array>
-        <array>
-            <string>linearize</string>
-            <real>0.1</real>
-            <real>1.0</real>
-            <real>1.0</real>
-            <real>1.0</real>
-        </array>
-        <array>
-            <string>contrast</string>
-            <real>1.1</real>
-            <real>1.0</real>
-            <real>1.0</real>
-            <real>1.0</real>
-        </array>
-        <array>
-            <string>fade</string>
-            <real>1.0</real>
-            <real>0.25</real>
-        </array>
-        <array>
-            <string>colorize</string>
-            <real>1.0</real>
-            <real>1.0</real>
-            <real>1.0</real>
-            <real>0.3</real>
-            <real>0.2</real>
-            <real>0.0</real>
-        </array>
-        <array>
-            <string>contrast</string>
-            <real>1.1</real>
-            <real>1.0</real>
-            <real>1.0</real>
-            <real>1.0</real>
-        </array>
-    </array>
-</llsd>

indra/newview/skins/default/xui/en/panel_flickr_photo.xml

@@ -53,10 +53,6 @@
                  label="No Filter"
                  name="NoFilter"
                  value="NoFilter" />
-                <combo_box.item
-                 label="Gray Scale"
-                 name="GrayScale"
-                 value="GrayScale" />
             </combo_box>
             <panel
                 height="150"