Issue #213: Add message to Base point's 'Options' dialog why 'OK' is disabled (dismine/valentina)

New issue 213: Add message to Base point’s ‘Options’ dialog why ‘OK’ is disabled https://bitbucket.org/valentinateam/valentina/issue/213/add-message-to-base-points-options-dialog

Susan Spencer:

In this use case:

  1. right click on Base Point (usually point A)
  2. select ‘Options’
  3. change X and/or Y values the results are:
  4. the OK button is grayed out, can only click ‘Cancel’

To make this easier for user, make these changes for Base Point’s ‘Options’ dialog:

  1. Disable X & Y input fields
  2. Display message "To move Base Point, right click on point and drag to new location’