first step in adding library function call and fix for TGCNote box being too wide and various other fixes related to zooming or library functions

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Removing colors when the nocolor option is activated. Icons are also removed on the TURTLE req diagrqm when the nocolor option is used

AVATAR BD: change of colors for embedded components
All diagrams: when passing the mouse pointer over a component, the colo of father and son component is chnged (orange -> brown)

AVATAR: Management of Timers: on AVATAR models, and also in the internal language + translation to UPPAAL