* terminal_strip:
Terminal strip item can saved / loaded to .qet file
See previous commit...
Move terminal strip drawer class in is own file
Fix wrong use of QStringLiteral and QLatin1String
Double click a TerminalStripItem open the editor
Minor change about checkable QAction of QetDiagramEditor
Minor : corrects a minor aesthetic defect when unbridge terminals
Revamp code
Add and move terminal strip item are now managed by undo command
TerminalStripItem : Draw terminal bridge
Terminal strip item can be added to diagram
Minor : add QGIUtility namespace
When a new bridge is created, an undo command is created for that.
When undo the action and redo it, all terminals are bridged to a new
bridge instead of the first one, who continue to exist but is now
empty and 'lost' because he will never be reused.
In addition of that, if a more recent undo command (we call it undo2)
use this bridge,
there is a unknown behavior, because the status of the bridge is not the
same as when the undo2 was created.
Move RealTerminal class in a new file
Move PhysicalTerminal class in a new file.
Remove the use of QWeakPointer and use instead QSharedPointer
in a big part of the revamp.
