CoqIDE: No more explicit activation of tooltips on toolbar.
CoqIDE: No more explicit activation of tooltips on toolbar.

According to
https://developer.gnome.org/gtk2/stable/GtkToolbar.html#gtk-toolbar-set-tooltips,
tooltips are now managed globally by gtk-enable-tooltips which is true by default.

gares/coq,ppedrot/coq,ppedrot/coq,silene/coq,Matafou/coq,SkySkimmer/coq,Zimmi48/coq,Matafou/coq,Matafou/coq,coq/coq,SkySkimmer/coq,gares/coq,SkySkimmer/coq,ejgallego/coq,silene/coq,gares/coq,ppedrot/coq,gares/coq,SkySkimmer/coq,JasonGross/coq,JasonGross/coq,Zimmi48/coq,coq/coq,ejgallego/coq,coq/coq,Zimmi48/coq,JasonGross/coq,silene/coq,ppedrot/coq,ppedrot/coq,ejgallego/coq,JasonGross/coq,coq/coq,gares/coq,Zimmi48/coq,ejgallego/coq