Transitions: Mention that defaultDialogTransition is deprecated

Fixes gh-7752
Closes gh-7754
Navigation: decodeURIComponent() in hash processing demo

Fixes gh-7816
Closes gh-7818
Demos: Fix text selection in "View Source" popup code view

Fixes gh-7856
Closes gh-7858
Toolbar: Only initialize this.pagecontainer if the toolbar is fixed

Fixes gh-7839
Closes gh-7860
Toolbar: Test absence of instance variable "pagecontainer"
Toolbar: Look for page container via class "ui-mobile-viewport"