fix: added new navigation drawer layout to deck_picker.xml in layout-xlarge
added navigation drawer to AnkiStatsActivity and updated layout,
updated NavigationDrawerActivity so that Statistics cannot be opend more than once when already open
Merge pull request #423 from trashcutter/stats_navigation_drawer

Added Navigation drawer to AnkiStatsActivity and fixed deck_picker.xml for large devices
optimized use of space on graph frame, decreased left and right frame size , rotated all numbers by 90°, made tick distance dependant on device
fix issue 2164 and issue 2182
Merge pull request #424 from timrae/studyOptionsFix

fix issue 2164 and issue 2182
Issue 2166
Merge pull request #425 from timrae/studyOptionsFix

Issue 2166
Updated translations
Bumped version to 2.2beta21
@branch-specific
Fix errors in 9aa5d9f
Merge pull request #426 from timrae/fixErrorsIn9aa5d9f

Fix errors in 9aa5d9f
Bumped version to 2.2beta22
@branch-specific
Fix showing of welcome screen on first app startup. Remove redundant code
Merge pull request #427 from timrae/welcomeScreen

Fix showing of welcome screen on first app startup
Bumped version to 2.2beta23
@branch-specific
optimized CreateChartTask to guarantee serial execution, made CreateChartTask cancelable, optimized text size, fixed legend not showing on Android 2.1 devices
Merged '73b3433' from develop: fix issue 2164 and issue 2182
Merged '362f3a3' from develop: Issue 2166
Merged '9fd83bf' from develop: Updated translations