doc: Sync classref with current source

doc/classes/EditorExportPlugin.xml

@@ -94,6 +94,14 @@
 			<description>
 			</description>
 		</method>
+		<method name="add_ios_project_static_lib">
+			<return type="void">
+			</return>
+			<argument index="0" name="path" type="String">
+			</argument>
+			<description>
+			</description>
+		</method>
 		<method name="add_shared_object">
 			<return type="void">
 			</return>

doc/classes/HSlider.xml

@@ -19,6 +19,8 @@
 		<theme_item name="grabber_area" type="StyleBox">
 			The background of the area to the left of the grabber.
 		</theme_item>
+		<theme_item name="grabber_area_highlight" type="StyleBox">
+		</theme_item>
 		<theme_item name="grabber_disabled" type="Texture">
 			The texture for the grabber when it's disabled.
 		</theme_item>

doc/classes/JNISingleton.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<class name="JNISingleton" inherits="Object" version="3.2">
+	<brief_description>
+	</brief_description>
+	<description>
+	</description>
+	<tutorials>
+	</tutorials>
+	<methods>
+	</methods>
+	<constants>
+	</constants>
+</class>

doc/classes/Skeleton.xml

@@ -38,6 +38,12 @@
 				Clear all the bones in this skeleton.
 			</description>
 		</method>
+		<method name="clear_bones_global_pose_override">
+			<return type="void">
+			</return>
+			<description>
+			</description>
+		</method>
 		<method name="find_bone" qualifiers="const">
 			<return type="int">
 			</return>

doc/classes/VSlider.xml

@@ -23,6 +23,8 @@
 		<theme_item name="grabber_area" type="StyleBox">
 			The background of the area below the grabber.
 		</theme_item>
+		<theme_item name="grabber_area_highlight" type="StyleBox">
+		</theme_item>
 		<theme_item name="grabber_disabled" type="Texture">
 			The texture for the grabber when it's disabled.
 		</theme_item>