Removed ambiguity in sidebar and added palettization example to color actions page

Author: jbunke

assets/graphics/palettization.gif

@@ -12,6 +12,8 @@
 
 Maps every non-transparent pixel in scope to the nearest RGBA color included in the currently selected [palette](./palette.md).
 
+![](./assets/graphics/palettization.gif)
+
 ## ![](https://raw.githubusercontent.com/jbunke/stipple-effect/master/res/icons/contents_to_palette.png) Extract canvas colors to palette
 
 [*API function*](../api/project.md#extract_to_pal)

color-actions.md

@@ -35,9 +35,9 @@
 ### Technical
 
 * [Scripting](./scripting.md)
-  * [Automation](./automation-scripts.md)
-  * [Preview](./preview-scripts.md)
-  * [Color](./color-scripts.md)
+  * [Automation scripts](./automation-scripts.md)
+  * [Preview scripts](./preview-scripts.md)
+  * [Color scripts](./color-scripts.md)
   * [Child scripts](./child-scripts.md)
 * [Save & Export](./save.md)
 * [Shortcuts](./shortcuts.md)