Enable displaying images by default in UI

From forum:

> Is there any way to show the card by default when the mouse is put over it, instead of showing a popup with description in plain text? I guess it's only switching event on mouse over and event roll the middle button.

The feature request is to add option to display images by default.
Possible solution is to add Preferences option that will change the order of render approach:
in case chosen - by default image will be displayed first and switch to rendering tooltip on mouse event