'Selectable' and 'Unselectable' row for DataTable is not visually distinguishable enough

[LinQiaoPorco]

Is your feature request related to a problem? Please describe.

Users can only see the grey color is a little lighter in 'Unselectable' row than normal rows

Describe the solution you'd like
.
We can have a better comparison between rows Selectable and Unselectable

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[capdiem]

@LinQiaoPorco Thank you for your feedback! I completely agree with your suggestion and plan to implement it in the upcoming v1.8.0 release.

[capdiem]

@LinQiaoPorco After careful consideration, I believe it's best not to change too many default styles. Instead, I have slightly adjusted the disabled color and added a class name m-data-table__disabled. If you're not satisfied with the new disabled color, you can customize the row styles based on this new class name.

.theme--light.m-data-table tr.m-data-table__disabled {
  color: rgba(0, 0, 0, .24);
}

.theme--dark.m-data-table tr.m-data-table__disabled {
  color: rgba(255, 255, 255, .42);
}

This will be released in v1.7.3.