Release Delete while holding element position glitch

This issue has been migrated from mozilla/webmaker-android#1819.

It was originally written by flukeout on Mon May 11 2015 and had the following description:

Neat little glitch:

• Add an image and select it, release finger
• Press and hold the delete element icon
• With second finger, press and hold the image
• Release first finger from delete button
• Image will jump upwards, about 1/4 of the page height

Note - this also happens with the Edit Element & Add Element buttons.

On Mon May 11 2015, Pomax commented:

:whale2:

On Mon May 11 2015, Pomax commented:

Sooo... reason for this is that, technically, a touch event registers as "second finger was released", despite the fact that the "a second finger was placed" never got registered.