The thing that makes this mod work is simply adding this:
Code:
IsDefaultButton="true"
To this line:
Code:
<Button LocalText="Find Items" LocalTooltip="Search the market and show any items that match this search." Location="20,500" Name="CommandFindItems" PackLocation="right,bottom" PackLocationProp="-798/0001,-100/0001" PackSize="fixed,fixed" PackSizeProp="0002/0003,0002/0003" ScrollExtent="165,42" Size="165,42" Style="/ButtonStyles.text_button_default" Tooltip="Search the market and show any items that match this search.">Find Items</Button>
*edit* With futher looking that is already in the correct line in the compact Market window... but there is another button with the property as well...
Maybe it conflicts? Maybe it works already? I dunno try it in game.