only check if #dropdown hasClass drop-versions if a drop down is open. Otherwise it will never open the history drop-down

fix missing dir creation for file versions (OC_Filesystemview::mkdir doesn't work here because it doesn't create directories recursively)

fixed max possible upload size for files app in admin screen

A suggestion for simple, yet efficient variable interpolation in js translations

add parent directory to the file cache if it does not exist yet.

fix for bug #1942: Allow user to share with every group if "allow users to share with anyone" is set

TODO for OC5: use CURRENT_TIMESTAMP for all databases. mysql supports it as a default for DATETIME since 5.6.5 [1]
as a fallback we could use <default>0000-01-01 00:00:00</default> everywhere
[1] http://bugs.mysql.com/bug.php?id=27645
http://dev.mysql.com/doc/refman/5.0/en/timestamp-initialization.html
http://www.postgresql.org/docs/8.1/static/functions-datetime.html
http://www.sqlite.org/lang_createtable.html
http://docs.oracle.com/cd/B19306_01/server.102/b14200/functions037.htm

put all the calls into one function and use tabs instead of spaces. Thanks to danimo for bugging me :-)