Increase drop-down list width when view on iPad
My layout contains a drop down list that is 'minimized' when accessed via the browser on an iPad - see attached. How can I increase the size of the drop-down list - I'm happy for it use the entire iPad display width if required).
I'm using IWP and when I access this via a desktop I can view the full text.
The drop-down list is populated via a value list which displays values from twos field in a table.