[TRANSUP] transifex update

Signed-off-by: Werner Macho <werner.macho@gmail.com>
always also update qgis_en.ts in update_ts_files.sh run
[composer] Switch to alt key for resize and draw from center mode
[composer] Add some missing icons to menu items
Disable preview modes under OSX due to issues with QGraphicsEffects under OSX (refs #10761)
Disable color picker under OSX, due to limitations with QWidget::grabMouse on that platform
[FEATURE][composer] Allow specifying user stylesheets to apply to a HTML item's content
Initialize expression field buffer to NULL
Prevents crash, see
https://github.com/qgis/QGIS/pull/1494#issuecomment-50303556
Fix crash with maximumValue/minimumValue for virtual fields
[composer] Add function for getting a friendly display name for items
Request geometry when virtual field requires
Fix some warnings
[composer] Add api method for toggling visibility of composer items
Make table sortable. Fixes #10962
[composer] Support merged undo/redo commands for multiframe items
Follow up 3f0d0944
[composer] More improvements to item dispayName methods