hide preference [system notificaitons] entry

Change-Id: Iea05878990d8b17d8ca3d36721ca0f905205d004
tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/208b849588024368b40d4e9b34916b41
change default size

Change-Id: Iecc20202e30f58696e5873289db013dedcdb2fc7
tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/d696659752234ae0b763be2f4e61d550
do not affect playing starting another instance

tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/4363449de13c4002a0c67e172982ec03

do not affect video playing while starting
another instance without CLI options

Change-Id: I7fc936b23a857c0af11edf0ffa64a8bcf8e9f46d
info&pref window flags refresh

Change-Id: I61a4732e391b986163d089ccc5b2051ae95a0a52
tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/d3cacefaa7da4e95ab730d83672e0d29
do not affect playing opening invalid file

Change-Id: Ib1433a4f89c49b0f5b559fce3fbc5448679c3a59
tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/0a8c834726c4401397734087995ac14e
change window default size

Change-Id: I056a4ee79afae94ade285fed35265e3023a7efcc
tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/d696659752234ae0b763be2f4e61d550/#f9d00ffb90234ff3a06b9cc3e1837566
translation udpate

Change-Id: I4383f473cc0adf56c336c226bd3c147ca5ea9be1
tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/37436e7b2fdb47879ee87a36ca464332/
tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/b5cc2232a5d3447d8df33e669aee2afe/
bugfix: cannot remember size

Change-Id: I80998832c8dc66034ec414ca20f2daaa35740592
tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/6396652d1955420793edfbe329cf103d/