Nested GridField dosn't have "Title" on small screens (less than 768px)

[sabina-talipova]

Description

In the current implementation of GridField, on small screens all columns are hidden (display: none;). In addition to the first one, new rules for display are applied to it (display: table-cell;).
With the current implementation of Nested GridField, the first column is occupied by an arrow icon and therefore the title (or any other fields in first data column) goes into the next column and is not displayed, except when this column contains information from the "Title" field (in this case, .grid-field__table td.col-Title {display: table- cell;});
The styles for nested GridField should be updated to display the first field correctly on small screens.