Merge pull request #380 from ceribik/develop

Proper implementation of hint feature of cloze deletions (fixes bug 1940)
Bumped version to 2.2alpha88
@branch-specific
Fix statistics dialog
fix browser always opening whole collection on tablet
Merge pull request #382 from timrae/fix-navigation-drawer

fix browser always opening whole collection on tablet
Merge pull request #381 from timrae/statistics-dialog

Fix statistics dialog
Bumped version to 2.2alpha89
@branch-specific