CellRendererInvoker: always reset the long-press controller
CellRendererInvoker: always reset the long-press controller

Follow up of: ad9b0e98668954022a98cb5fdc63196d947c1b38

Signed-off-by: Ajay Garg <1c58a446a63e719d7b90156a8998ccc461609ed7@activitycentral.com>

ceibal-tatu/sugar-toolkit-gtk3,ceibal-tatu/sugar-toolkit-gtk3,ceibal-tatu/sugar-toolkit-gtk3