Remove chrome and popup parameters from ephy_shell_new_tab_full

It's always called with chome=ALL and is-popup=FALSE. The window is
configured according to the WebKitWindowProperties of the view after is
created.
Move the window geometry handling from EphyEmbed to EphyWindow

EphyEmbed should not change the window geometry.
Remove show-toolbars setting

Epiphany doesn't have toolbars anymore and we don't want to hide the
headerbar.
Make sure the toolbar is always visible

Now that Epiphany is using a headerbar hiding the toolbar means there's no
way to move or close the window.
Move the UI chrome handling to EphyWindow

Unify all chrome flags in a single enum used by EphyWindow.
popup windows should respect the window properties

Change the windows chrome according to the window properties used when
creating popups.

https://bugzilla.gnome.org/show_bug.cgi?id=723238
Make the location entry non-editable for popups