i18n: Misc fixes translation strings

Adds some translator comments to solve some questions raised on Weblate.

doc/classes/Color.xml

@@ -157,10 +157,10 @@
 				Constructs a color from an [url=https://en.wikipedia.org/wiki/HSL_and_HSV]HSV profile[/url]. [code]h[/code] (hue), [code]s[/code] (saturation), and [code]v[/code] (value) are typically between 0 and 1.
 				[codeblocks]
 				[gdscript]
-				var c = Color.from_hsv(0.58, 0.5, 0.79, 0.8)
+				var color = Color.from_hsv(0.58, 0.5, 0.79, 0.8)
 				[/gdscript]
 				[csharp]
-				var c = Color.FromHsv(0.58f, 0.5f, 0.79f, 0.8f);
+				var color = Color.FromHsv(0.58f, 0.5f, 0.79f, 0.8f);
 				[/csharp]
 				[/codeblocks]
 			</description>
@@ -175,10 +175,10 @@
 				Constructs a color from an [url=https://bottosson.github.io/posts/colorpicker/]OK HSL profile[/url]. [code]h[/code] (hue), [code]s[/code] (saturation), and [code]v[/code] (value) are typically between 0 and 1.
 				[codeblocks]
 				[gdscript]
-				var c = Color.from_ok_hsl(0.58, 0.5, 0.79, 0.8)
+				var color = Color.from_ok_hsl(0.58, 0.5, 0.79, 0.8)
 				[/gdscript]
 				[csharp]
-				var c = Color.FromOkHsl(0.58f, 0.5f, 0.79f, 0.8f);
+				var color = Color.FromOkHsl(0.58f, 0.5f, 0.79f, 0.8f);
 				[/csharp]
 				[/codeblocks]
 			</description>

doc/classes/EditorPlugin.xml

@@ -479,7 +479,7 @@
 		<method name="get_script_create_dialog">
 			<return type="ScriptCreateDialog" />
 			<description>
-				Gets the Editor's dialogue used for making scripts.
+				Gets the Editor's dialog used for making scripts.
 				[b]Note:[/b] Users can configure it before use.
 				[b]Warning:[/b] Removing and freeing this node will render a part of the editor useless and may cause a crash.
 			</description>

doc/classes/NodePath.xml

@@ -107,7 +107,7 @@
 			<return type="StringName" />
 			<argument index="0" name="idx" type="int" />
 			<description>
-				Gets the node name indicated by [code]idx[/code] (0 to [method get_name_count]).
+				Gets the node name indicated by [code]idx[/code] (0 to [method get_name_count] - 1).
 				[codeblocks]
 				[gdscript]
 				var node_path = NodePath("Path2D/PathFollow2D/Sprite2D")

doc/classes/OS.xml

@@ -550,7 +550,7 @@
 				Requests the OS to open a resource with the most appropriate program. For example:
 				- [code]OS.shell_open("C:\\Users\name\Downloads")[/code] on Windows opens the file explorer at the user's Downloads folder.
 				- [code]OS.shell_open("https://godotengine.org")[/code] opens the default web browser on the official Godot website.
-				- [code]OS.shell_open("mailto:example@example.com")[/code] opens the default email client with the "To" field set to [code]example@example.com[/code]. See [url=https://blog.escapecreative.com/customizing-mailto-links/]Customizing [code]mailto:[/code] Links[/url] for a list of fields that can be added.
+				- [code]OS.shell_open("mailto:example@example.com")[/code] opens the default email client with the "To" field set to [code]example@example.com[/code]. See [url=https://datatracker.ietf.org/doc/html/rfc2368]RFC 2368 - The [code]mailto[/code] URL scheme[/url] for a list of fields that can be added.
 				Use [method ProjectSettings.globalize_path] to convert a [code]res://[/code] or [code]user://[/code] path into a system path for use with this method.
 				[b]Note:[/b] This method is implemented on Android, iOS, HTML5, Linux, macOS and Windows.
 			</description>

doc/classes/Range.xml

@@ -4,7 +4,7 @@
 		Abstract base class for range-based controls.
 	</brief_description>
 	<description>
-		Range is a base class for [Control] nodes that change a floating-point [i]value[/i] between a [i]minimum[/i] and a [i]maximum[/i], using [i]step[/i] and [i]page[/i], for example a [ScrollBar].
+		Range is a base class for [Control] nodes that change a floating-point [member value] between a [member min_value] and [member max_value], using a configured [member step] and [member page] size. See e.g. [ScrollBar] and [Slider] for examples of higher level nodes using Range.
 	</description>
 	<tutorials>
 	</tutorials>

doc/classes/RenderingServer.xml

@@ -3035,7 +3035,7 @@
 				    $Viewport.set_attach_to_screen_rect(Rect2(0, 0, 600, 600))
 				[/gdscript]
 				[/codeblocks]
-				Using this can result in significant optimization, especially on lower-end devices. However, it comes at the cost of having to manage your viewports manually. For a further optimization see, [method viewport_set_render_direct_to_screen].
+				Using this can result in significant optimization, especially on lower-end devices. However, it comes at the cost of having to manage your viewports manually. For further optimization, see [method viewport_set_render_direct_to_screen].
 			</description>
 		</method>
 		<method name="viewport_create">

doc/classes/SceneTreeTimer.xml

@@ -22,7 +22,7 @@
 		}
 		[/csharp]
 		[/codeblocks]
-		The timer will be automatically freed after its time elapses.
+		The timer will be automatically freed after its time elapses, so be aware that any reference you might have kept to it will become invalid.
 	</description>
 	<tutorials>
 	</tutorials>