res/desktop::fixed rename in desktop,but the sogou will not show.

resolve:
    1.update the set_position_input(x,y) value:
    ----use _GRID_WIDTH_INIT instead of _ITEM_WIDTH
    ----use _GRID_HEIGHT_INIT instead of _ITEM_HEIGHT

    2.move set_position_input to input callback
    ----to fix if the input clientHeight to larget ,and the sogou above
    the input element
    ----and if the user keydown the keyboard in zh by sogou, the input
    callback function still can be loaded.

tower:https://tower.im/projects/1c0cd0c59ef941298c6e6b2ba6833b91/todos/b1d095cb7a44409ca553708b43779082/?proto=https

Change-Id: I345c7e254e9490ad64a8e310784d572e2c1e3ec7