Several bugs related to precedences graph (2)

[Jerome Legrand]

These bugs has been found and non resolved in ticket 10 fixes.

Bug 1

"new item" dialog box is modal but does not remain visible if the user click on another Cheddar window.

Bug 2

2 structures (an array and a list) are used to manage item in "dependences graph" dialog box. A variable represents last item added index. When an item is added, this variable is incremented (Ok) but when an item is removed, it is not decremented...

Furthermore, the use of the 2 structures is not clear in the source code...

Bug 3

One can find the following string hard coded : "message", "buffer" and "task"...