Coc.nvim: Show the diagnostic message when the cursor is at related line rather than at a position

[zhou13]

Is your feature request related to a problem? Please describe.
Currently coc.nvim only shows the diagnostic message when you place the cursor at the correct location. For example, you need to move the cursor under M in order to get the diagnostic message

For ccls, sometimes this is impossible because the error is locate at the end of the line (line 5 only has 18 columns, maybe that is a bug of ccls but anyway...).

Describe the solution you'd like
I hope that I can get the diagnose after I move my cursor to the corresponding line. The column does not need to be in the column of the error.

Describe alternatives you've considered
I tried to search through the help file but I cannot find related stuff.

[iamcco]

coc-settings.json

  "diagnostic.checkCurrentLine": true,

[atsepkov-zaius]

I enabled this as well and prefer it to the default. However, now I have another minor problem. The TS warning/error messages themselves do not mention column number, and for some of the more cryptic ones I sometimes start investigating the wrong symptom. Is it possible to still show all line warnings regardless of cursor position while underlining the atoms responsible (like the default without this setting)?