we can't paste any numbers to calculator ,because the option is gray

current build number: 47
device name: arale
channel: ubuntu-touch/rc-proposed/meizu.en
last update: 2015-07-06 05:43:41
version version: 47
version ubuntu: 20150706
version device: 20150701-cdd791c
version custom: 20150602-731-5-32

Steps:

  1.open message app(or other app with numbers), copy some numbers
  2.open calculator app ,long press the input box to paste

Expectation:

  we can paste those numbers in the calculator

Actual result:
  after the action 2#, there is a dialog"paste,select all",but both of them are in gray,and can't be chosen