I've been unable to find the solution via searching for what I imagine is a common scenario:

I have a multiline grid cell (custom renderer setting white-space: normal). I'd like the TextArea that appears when the cell is double clicked to take up the full size of the cell, rather than a fixed 3 lines or so, which is what happens now.
The cell has an editor grid defined as follows:

Code:
col.editor = new Ext.grid.GridEditor(new Ext.form.TextArea({
						cls: "grid-text-area-editor",
						grow: true
					}),
					{
						autoSize: true
					});
The css class I add there sets height: 100% !important, but I can see in Firebug, that it's not getting applied.

I'm sure there's something simple I'm missing, any help would be appreciated.