General navigation fixes
Remove old code
Remove logout method from OpManager
Remove unused code
Rename WorkspaceItems to WorkspaceViewItems
Split MACWallet into MACWallet and MACSearch components
Refactor addWorkspace and addWorkspaceFromMashup into Wirecloud.createWorkspace
Move removeWorkspace code to core.js
Remove OpManager.showPlatformPreferences
Move mergeWorkspace to core.js
Improve focus and blur support on buttons
Reimplement workspace creation from mashups
Minor test tweaks