Don't use IFileInfo.toString() in UI, use IFileStore.toString()

The `IFileInfo.toString()` isn't intended to be shown to user, it has no
information interesting for users.

The `IFileStore.toString()` should be used in cases if information about
deleted resources need to be shown in UI.

Additionally changed dialog wording to not use "location" and be more
clear about what's going on.

Fixes eclipse-platform/eclipse.platform#1404

bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/actions/RefreshAction.java

@@ -16,11 +16,13 @@
 package org.eclipse.ui.actions;
 
 import java.lang.reflect.InvocationTargetException;
+import java.net.URI;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 
 import org.eclipse.core.filesystem.IFileInfo;
+import org.eclipse.core.filesystem.IFileStore;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IResourceRuleFactory;
@@ -113,11 +115,13 @@ void checkLocationDeleted(IProject project) throws CoreException {
 		if (!project.exists()) {
 			return;
 		}
-		IFileInfo location = IDEResourceInfoUtils.getFileInfo(project.getLocationURI());
+		URI locationURI = project.getLocationURI();
+		IFileInfo location = IDEResourceInfoUtils.getFileInfo(locationURI);
 		if (!location.exists()) {
+			String displayedProjectPath = toDisplayPath(locationURI);
 			String message = NLS.bind(
 					IDEWorkbenchMessages.RefreshAction_locationDeletedMessage,
-					project.getName(), location.toString());
+					project.getName(), displayedProjectPath);
 
 			final MessageDialog dialog = new MessageDialog(getShell(),
 					IDEWorkbenchMessages.RefreshAction_dialogTitle, // dialog
@@ -143,6 +147,11 @@ protected int getShellStyle() {
 		}
 	}
 
+	private static String toDisplayPath(URI locationURI) {
+		IFileStore fileStore = IDEResourceInfoUtils.getFileStore(locationURI);
+		return fileStore != null ? fileStore.toString() : locationURI.toString();
+	}
+
 	@Override
 	protected String getOperationMessage() {
 		return IDEWorkbenchMessages.RefreshAction_progressMessage;

bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/messages.properties

@@ -327,8 +327,8 @@ RefreshAction_toolTip = Refresh
 RefreshAction_progressMessage = Refreshing...
 RefreshAction_problemTitle = Refresh Problems
 RefreshAction_problemMessage = Problems occurred refreshing the selected resources.
-RefreshAction_locationDeletedMessage = The location for project ''{0}'' ({1}) has been deleted.\nDelete ''{0}'' from the workspace?
-RefreshAction_dialogTitle = Project location has been deleted
+RefreshAction_locationDeletedMessage = Directory ''{1}'' has been deleted.\nDelete also project ''{0}'' from the workspace?
+RefreshAction_dialogTitle = Project has been deleted on file system
 
 SelectWorkingSetAction_text= Select &Working Set...