Better timeout defaults for intermediary page
Better timeout defaults for intermediary page

In some situations an error could be displayed otherwise since
online.gif was available, intermediary.gif wasn't anymore, but pinging
the latter timed out before the next ping of the former.

(cherry picked from commit 7809ba8)

foosel/OctoPrint,shohei/Octoprint,shohei/Octoprint,MoonshineSG/OctoPrint,MoonshineSG/OctoPrint,JackGavin13/octoprint-test-not-finished,Salandora/OctoPrint,ryanneufeld/OctoPrint,JackGavin13/octoprint-test-not-finished,senttech/OctoPrint,ryanneufeld/OctoPrint,foosel/OctoPrint,beeverycreative/BEEweb,beeverycreative/BEEweb,Salandora/OctoPrint,beeverycreative/BEEweb,senttech/OctoPrint,Jaesin/OctoPrint,nickverschoor/OctoPrint,Jaesin/OctoPrint,nickverschoor/OctoPrint,Jaesin/OctoPrint,shohei/Octoprint,Salandora/OctoPrint,ryanneufeld/OctoPrint,shohei/Octoprint,beeverycreative/BEEweb,Salandora/OctoPrint,foosel/OctoPrint,senttech/OctoPrint,JackGavin13/octoprint-test-not-finished,senttech/OctoPrint,Jaesin/OctoPrint,foosel/OctoPrint,nickverschoor/OctoPrint,nickverschoor/OctoPrint,MoonshineSG/OctoPrint,bicephale/OctoPrint,MoonshineSG/OctoPrint,bicephale/OctoPrint,ryanneufeld/OctoPrint,shohei/Octoprint,bicephale/OctoPrint,JackGavin13/octoprint-test-not-finished,bicephale/OctoPrint