mosaic view properly show.
Bug fixed:
Bug fixed, invlalid regex string.
Added s:sesssion.quit, let enter key handling honor user's intention.
Refactored omnimenu, separate views from controler.
Bug fixed: return a list of a single line not a single text line.
Bug fixed: return 'handled' in on_enter() of providers/top_menu.vim
Improved list_view <C-k/j> key handle logic.
Start to implement grid view.
grids arranges properly.
Can move cursor in grid view.