Set focus on method button every time, when it's pressed.
Navigation between MemberGroups added.
Not used method removed.
Trigger was rewritten with IsFocused property. Added TODO comment.
Remove dead comments.
Merge branch 'Sitrus2' into DUI-KeyNavigation2
numberOfFocusedMemberGroup renamed into focusedMemberGroupIndex
nextFocusedMemberGroupNumber renamed into nextFocusedMemberGroupIndex
merberGroups renamed into memberGroups
Added comments.
generator is used instead of long code.
Put return to next line.
ContainsMember added to SearchMemberGroup.
ToList() removed.
Merge pull request #123 from vmoyseenko/DUI-KeyNavigation2

DUI: key navigation. Part 1