avoid enabling or showing the account spinner

About the only time we want to show the account spinner is in
conversation list mode (or in conversation mode in 2-pane).
Have initialization inherit the default standard mode, and only
those specific mode changes will cause a spinner to appear.

Bug: 6346743
Change-Id: I8e86d05471588425e79fe3552949e7d6a84355a3
1 file changed