doc: Sync classref with current source

doc/classes/@GlobalScope.xml

@@ -77,9 +77,6 @@
 		<member name="ProjectSettings" type="ProjectSettings" setter="" getter="">
 			The [ProjectSettings] singleton.
 		</member>
-		<member name="RenderingDevice" type="RenderingDevice" setter="" getter="">
-			The [RenderingDevice] singleton.
-		</member>
 		<member name="RenderingServer" type="RenderingServer" setter="" getter="">
 			The [RenderingServer] singleton.
 		</member>

doc/classes/PopupMenu.xml

@@ -242,6 +242,12 @@
 				Removes all items from the [PopupMenu].
 			</description>
 		</method>
+		<method name="get_current_index" qualifiers="const">
+			<return type="int">
+			</return>
+			<description>
+			</description>
+		</method>
 		<method name="get_item_accelerator" qualifiers="const">
 			<return type="int">
 			</return>

doc/classes/String.xml

@@ -620,6 +620,19 @@
 				Returns [code]true[/code] if this string contains a valid IP address.
 			</description>
 		</method>
+		<method name="join">
+			<return type="String">
+			</return>
+			<argument index="0" name="parts" type="PackedStringArray">
+			</argument>
+			<description>
+				Return a [String] which is the concatenation of the [code]parts[/code]. The separator between elements is the string providing this method.
+				Example:
+				[codeblock]
+				print(", ".join(["One", "Two", "Three", "Four"]))
+				[/codeblock]
+			</description>
+		</method>
 		<method name="json_escape">
 			<return type="String">
 			</return>
@@ -837,19 +850,6 @@
 				Returns a copy of the string with characters removed from the right.
 			</description>
 		</method>
-		<method name="join">
-			<return type="String">
-			</return>
-			<argument index="0" name="parts" type="PackedStringArray">
-			</argument>
-			<description>
-				Return a [String] which is the concatenation of the [code]parts[/code]. The separator between elements is the string providing this method.
-				Example:
-				[codeblock]
-				print(", ".join(["One", "Two", "Three", "Four"]))
-				[/codeblock]
-			</description>
-		</method>
 		<method name="sha1_buffer">
 			<return type="PackedByteArray">
 			</return>

doc/classes/TextEdit.xml

@@ -343,17 +343,6 @@
 				Select all the text.
 			</description>
 		</method>
-		<method name="set_line_as_hidden">
-			<return type="void">
-			</return>
-			<argument index="0" name="line" type="int">
-			</argument>
-			<argument index="1" name="enable" type="bool">
-			</argument>
-			<description>
-				If [code]true[/code], hides the line of the specified index.
-			</description>
-		</method>
 		<method name="set_line">
 			<return type="void">
 			</return>
@@ -365,6 +354,17 @@
 				Sets the text for a specific line.
 			</description>
 		</method>
+		<method name="set_line_as_hidden">
+			<return type="void">
+			</return>
+			<argument index="0" name="line" type="int">
+			</argument>
+			<argument index="1" name="enable" type="bool">
+			</argument>
+			<description>
+				If [code]true[/code], hides the line of the specified index.
+			</description>
+		</method>
 		<method name="toggle_fold_line">
 			<return type="void">
 			</return>

doc/classes/TreeItem.xml

@@ -249,6 +249,14 @@
 			<description>
 			</description>
 		</method>
+		<method name="get_suffix" qualifiers="const">
+			<return type="String">
+			</return>
+			<argument index="0" name="column" type="int">
+			</argument>
+			<description>
+			</description>
+		</method>
 		<method name="get_text" qualifiers="const">
 			<return type="String">
 			</return>
@@ -572,6 +580,16 @@
 				If [code]true[/code], the given column is selectable.
 			</description>
 		</method>
+		<method name="set_suffix">
+			<return type="void">
+			</return>
+			<argument index="0" name="column" type="int">
+			</argument>
+			<argument index="1" name="text" type="String">
+			</argument>
+			<description>
+			</description>
+		</method>
 		<method name="set_text">
 			<return type="void">
 			</return>