beginning of the recursive menu + add tooltip in ParametersEditor and customized it

without repeater for the moment
fix bug of display (plugin in various menu, ...)
correct a mistake of a previous commit that not display plugin list
add a close button to the node properties
comment code and add posibility to select text in text input
add a shortcut which permits to create the single node of the plugin browser
Merge branch 'release' of https://github.com/buttleofx/ButtleOFX into dev_menu

Conflicts:
	buttleofx/MainWindow.qml
Possibility to import images to advanced paramEditors with drag&drop (and import button)
move the node properties into graph editor and can be displayed only on one node a time
Improved Save functions : Save As to specify a path, Save to save without using a filedialog.
Merge branch 'release' of https://github.com/buttleofx/ButtleOFX into release
correct the bug of display of node properties
Merge branch 'release' of https://github.com/buttleofx/ButtleOFX into dev_menu

Conflicts:
	buttleofx/gui/paramEditor/qml/ParametersEditor.qml
change the "add node" display of parametersEditor from menu to pluginBrowser
minor correct of display for pluginBrowser
New center button