Fix view mode-specific settings not always applying

Fix view mode-specific settings not always applying

When the current view mode is different from the view mode for
which settings were changed in Dolphin's settings dialog, those
changes were sometimes not present when then changing the view
mode of a view to the view mode for which settings were changed.

This commit fixes this by always loading the settings for all view
modes in the DolphinItemListView even if the view is currently
using only one of those view modes.