Description

An optional toolbar above the column headers could be useful for a number of features:

• For displaying the Grid's title, which is a very common need, and was available as the "caption" of a Grid/Table in V8/7.
• For a column visibility toggle (Add Column visibility toggler for the grid flow-components#1603) instead of overlaying the column header row.
• For a filter row toggle (that toggles the visibility of a filter row below the headers)
• For providing a place to slot custom features relevant for a Grid (e.g. a non-column-specific quick search field, a "New item" button, an "Export" button...)
• Buttons for toggling a "column management mode" for reordering and resizing column using keyboard

Sketch of what this might look like:

An opt-in footer could also be useful, e.g. for displaying the total number of items and currently filtered and/or selected items. Today this can be done using footer rows, but that approach is unncessarily complicated for something that doesn't need to fit into the Grid's columns.