Problems file path incorrect when using projectPath

[thdxr]

It seems the projectPath is not respected when showing problems (get a file not found error)

[scout119]

It also doesn't work with umbrella projects. A problem reported for a source file using relative path for a project that files belongs to. It should take into account

• parent umbrella project location
• apps_path settings in umbrella's mix.exs
• project name(path) inside umbrella

Thanks!