Support switch between grid or linear mode

[eritpchy]

Behavier change:

• click icon changed to enter
• long click icon trigger file options menu
• in grid mode, file options icon is hidden

demo

https://user-images.githubusercontent.com/8630635/133236382-9d997fa6-0a74-4a68-8e75-d92b6ad3c8ff.mp4

[aquatic7]

When will this be added? Can't wait for it 😋