Data Quick Menu for Sonar Range incorrect

#### Issue details
I have connected a TFMini Plus sonar via I2C and it shows 7m but it is actually 7ft by my ruler.

#### Version
1,3,74

#### Platform
[ ] All
[ ] AntennaTracker
[ x ] Copter
[ ] Plane
[ ] Rover
[ ] Sub

#### Airframe type
Quad

#### Hardware type
Pixhawk 1

#### Logs
_Please provide a link to any relevant logs that show the issue_

Start with the Data Quick Menu handling for the TFMini Plus sonar over I2C and reproduce the reported reading on the Copter and Pixhawk 1 setup. Compare the displayed range with the ruler measurement and determine the expected unit conversion; done means the quick menu reports the correct range and the behavior is verified against a relevant test or reproduction.

Written by the indexing model from the issue text.