FR: present NUMERIC keyboard when numeric data expected

[nonchai]

There are many places in ZenBeats on iOS where a dialog box is presented where one can manually enter a value via a pop up keyboard. Trouble is - currenrtly just the default iPad keyboard is presented thus I constantly have to press buttons to switch to the numeric keyboard.

When a data value is clearly only ever going to be NUMERIC its much more workflow friendly to only present a NUMERIC on-screen keyboard for data entry. One should never - GUI wise be presented with the option to enter alphanumeric characters in a data entry field - where - for example in the case of BPM - only a number is valid.