Refresh function image during ui update loop
Refresh function image during ui update loop

**What**
- Update the function image value during the `refreshData`

Signed-off-by: Lucas Roesler <beef10855a411edf7f10a2e0b798b93667a3aba8@gmail.com>

rgee0/faas,alexellis/faas,openfaas/faas,rgee0/faas,alexellis/faas,rgee0/faas,rgee0/faas,rgee0/faas,openfaas/faas,alexellis/faas,alexellis/faas,alexellis/faas,rgee0/faas,alexellis/faas,rgee0/faas,alexellis/faas,alexellis/faas,rgee0/faas,rgee0/faas,openfaas/faas,alexellis/faas,rgee0/faas