PLF-5679: "Search Spaces" is hard-coded in UISpaceNavigationPortlet

Conflicts:

	extension/portlets/platformNavigation/src/main/webapp/groovy/platformNavigation/portlet/UISpaceNavigationPortlet/UISpaceNavigationPortlet.gtmpl
PLF-5631 WARN Cannot find resource bundle for key UIUserPlatformToolBarPortlet.label.find, UIUserNavigationPortlet.label.dashboard

Fix description
* Remove the redundant variable of UIUserPlatformToolBarPortlet.label.find
* Update the condition to not create UIUserNavigationPortlet.label.dashboard.
PLF-5705: [Quick Upload File] i18n of Cancel button
PLF-5708: [IE8] Exception thrown when opening Sites/Navigation
PLF-5649 The properties exo:script and exo:scriptLabel of "exo:populateToMenu" node type are read-only

Fix description:
* Change the attribute 'protected' of these properties to 'false' so that they can be modified.