Adding localization notes per Bugzilla #39775 beta2+

r=rchen@netscape.com

editor/ui/dialogs/locale/en-US/EditorInsertSource.dtd

@@ -24,7 +24,8 @@
 <!ENTITY windowTitle.label "Insert HTML">
 <!ENTITY sourceEditField.label "Enter HTML tags and text:">
 <!ENTITY example.label "Example: ">
-<!-- Don't translate the next 2: they are text for HTML tagnames: "<i>" and "</i>" -->
+<!-- LOCALIZATION NOTE (exampleOpenTag.label): DONT_TRANSLATE: they are text for HTML tagnames: "<i>" and "</i>" -->
 <!ENTITY exampleOpenTag.label "&lt;i&gt;">
+<!-- LOCALIZATION NOTE (exampleCloseTag.label): DONT_TRANSLATE: they are text for HTML tagnames: "<i>" and "</i>" -->
 <!ENTITY exampleCloseTag.label "&lt;/i&gt;">
 <!ENTITY exampleText.label "Hello World!">

editor/ui/dialogs/locale/en-US/EditorPageProperties.dtd

@@ -28,8 +28,8 @@
 <!ENTITY authorInput.label "Author:">
 <!ENTITY descriptionInput.label "Description:">
 <!ENTITY locationNewPage.label "[New page, not saved yet]">
-<!-- Don't translate "&lt;HEAD&gt;" it is the HTML tagname -->
+<!-- LOCALIZATION NOTE (headSection.label): Don't translate "&lt;HEAD&gt;" it is the HTML tagname -->
 <!ENTITY headSection.label "Enter html source for elements and attributes to insert under the &lt;HEAD&gt; tag:">
 <!ENTITY example.label "Example: ">
-<!-- Don't translate this: it is a HTML tag and attributes -->
+<!-- LOCALIZATION NOTE (example.value): DONT_TRANSLATE -->
 <!ENTITY example.value "&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=ISO-8859-5&quot;&gt;">

editor/ui/dialogs/locale/en-US/EditorTableProperties.dtd

@@ -32,7 +32,7 @@
 <!ENTITY tableSpacing.label               "Spacing:">
 <!ENTITY tablePadding.label               "Padding:">
 <!ENTITY tablePxBetwCells.label           "pixels between cells">
-<!-- Don't translate <html:br/> -->
+<!-- LOCALIZATION NOTE (tablePxBetwBrdrCellContent.label): Don't translate <html:br/> -->
 <!ENTITY tablePxBetwBrdrCellContent.label "pixels between border<html:br/>and cell content">
 <!ENTITY tableAlignment.label             "Table Alignment:">
 <!ENTITY tableCaption.label               "Caption:">