[*] StbMainApp: Add refreshing playlist on TV key (needs for STB840 PromSvyaz)

Signed-off-by: Anton Sergeev <Anton.Sergeev@elecard.ru>
[*] StbMainApp: Fix redefinitions

Signed-off-by: Anton Sergeev <Anton.Sergeev@elecard.ru>
[*] StbMainApp: Improve StbMainApp's makefile. There is no need to clean StbMainApp everywhere now.

Signed-off-by: Anton Sergeev <Anton.Sergeev@elecard.ru>