Modifying the value of the "default.page.title" in ConfluenceActionSupport.properties file does not take effect in the interface causing incomplete translations

Steps to replicate

1. Explore the file \confluence\WEB-INF\lib\confluence-3.x.jar
2. Open up the file com.atlassian/confluence/core/ ConfluenceActionSupport.properties
3. Edit the property default.page.title from Home to something else e.g Startseite
4. Save the file in <Confluence-Install>\confluence\WEB-INF\classes\com\atlassian\confluence\core
5. Upon restart, it is expected that the default page title to be changed appropriately from Home but that was not the case.
6 If you change any other property such as action.space.add, it works without any problem as shown in the screen capture.

This has caused incomplete translations on plugins. I have the exploded the German translation pack as an example and found out that the home property has been translated but fails to work due to this bug. Here is a section of the file:

################################################################
# ACTION:   CreateSpaceAction
################################################################

#formerly CreateSpaceAction.properties
title.add.space=Bereich erstellen
com.atlassian.confluence.spaces.actions.CreateSpaceAction.action.name=Bereich erstellen

space.key.exists=Der eingegebene Bereichsschl\u00fcssel existiert bereits.
space.key.invalid=Bereichsschl\u00fcssel d\u00fcrfen nur aus ASCII-Buchstaben oder Ziffern (A-Z, a-z, 0-9) bestehen.

default.page.title=Startseite
default.page.content=Dies ist die Startseite des Bereichs {0}.

title.add.space.success=Bereich erfolgreich erstellt
create.space.successful.message=Sie haben einen Bereich erstellt. Von hier aus k\u00f6nnen Sie...