Show more neat messages about connection problems

- try to repeat problem actions with 5 sec delay;
- change message type from error to warning for connection problem.

Change-Id: I78f2b04cbbd7135b8dc27174a4291c7339c9a973
Closes-Bug: #1306729
(cherry picked from commit 773cc49087e9e7dce15c50d9c7bb39495ccce9b2)