Shorten discard editing dialog text

    <!-- Positive button text for the cancel editing confirmation dialog.

      Pushing this button indicates that the user wishes to discard the changes they have already

      made and close the editor. [CHAR LIMIT=50] -->

    <string name="cancel_confirmation_dialog_cancel_editing_button">Discard changes</string>

      made and close the editor. [CHAR LIMIT=20] -->

    <string name="cancel_confirmation_dialog_cancel_editing_button">Discard</string>

    <!-- Negative button text for the cancel editing confirmation dialog.

      Pushing this button indicates that the user wishes to continue editing

      and return to the editor [CHAR LIMIT=40] -->

      and return to the editor [CHAR LIMIT=30] -->

    <string name="cancel_confirmation_dialog_keep_editing_button">Keep editing</string>

    <!-- Description of a call log entry, made of a call type and a date -->