Sliding away from backspace key results in continued backspaces

[Wenfang Si]

found with arale device, r178, ubuntu-touch/vivid-proposed
also happens to krillin

Steps
1. Launch Message app
2. Type some text
3. Press backspace key and slide away from the key and release a little slowly

Expect
Only the last charactor is deleted
(should behave similar as sliding away from any other key, that the "kep press" action only happens once)

Actual
It keeps doing backspace as if I am holding on the backspace key

[Evan Wang (wsy324)]

I can reproduce this issue at r183 on Arale.

$ system-image-cli -i
current build number: 183
device name: m75
channel: ubuntu-touch/vivid-proposed
last update: 2010-01-01 00:51:35
version version: 183