gvle2: add Qt for windows
gvle2: fix the experimental condition settings
gvle2: add the observable editor and selector
gvle2: update the installer builder
decision: fix the suffix system
decision: fix the reset of some entries
decision: fix the rename feature on each item
decision: add a prefix concept
difference-equation: fix the GUI for Windows
decision: add a relative date to year concept
decision: fix the date managment GUI
decision: fix of empty settings generalized
gvle: fix the tuple editor dialog
gvle: fix the DynamicBox combo boxes
gvle: fix the ConditionsBox
gvle: fix the scrollbars of the main window
gvle: fix the matrix value editor