Add some missing EditorFileDialog methods and properties.

doc/classes/EditorFileDialog.xml

@@ -25,6 +25,13 @@
 				Removes all filters except for "All Files (*)".
 			</description>
 		</method>
+		<method name="get_line_edit">
+			<return type="LineEdit" />
+			<description>
+				Returns the LineEdit for the selected file.
+				[b]Warning:[/b] This is a required internal node, removing and freeing it may cause a crash. If you wish to hide it or any of its children, use their [member CanvasItem.visible] property.
+			</description>
+		</method>
 		<method name="get_vbox">
 			<return type="VBoxContainer" />
 			<description>
@@ -62,6 +69,9 @@
 		<member name="file_mode" type="int" setter="set_file_mode" getter="get_file_mode" enum="EditorFileDialog.FileMode" default="4">
 			The dialog's open or save mode, which affects the selection behavior. See [enum FileMode]
 		</member>
+		<member name="filters" type="PackedStringArray" setter="set_filters" getter="get_filters" default="PackedStringArray()">
+			The available file type filters. For example, this shows only [code].png[/code] and [code].gd[/code] files: [code]set_filters(PackedStringArray(["*.png ; PNG Images","*.gd ; GDScript Files"]))[/code]. Multiple file types can also be specified in a single filter. [code]"*.png, *.jpg, *.jpeg ; Supported Images"[/code] will show both PNG and JPEG files when selected.
+		</member>
 		<member name="show_hidden_files" type="bool" setter="set_show_hidden_files" getter="is_showing_hidden_files" default="false">
 			If [code]true[/code], hidden files and directories will be visible in the [EditorFileDialog]. This property is synchronized with [member EditorSettings.filesystem/file_dialog/show_hidden_files].
 		</member>