[Kst] [Kst-plot/kst] 4f6f0b: Make Zoom/Layout mode consistent between tabs.

[Barth Netterfield]

  Branch: refs/heads/master
  Home:   https://github.com/Kst-plot/kst
  Commit: 4f6f0b8c30f6da704072c9459a2d757b266a7af5
      https://github.com/Kst-plot/kst/commit/4f6f0b8c30f6da704072c9459a2d757b266a7af5
  Author: Barth Netterfield <netterfield at astro.utoronto.ca>
  Date:   2015-01-08 (Thu, 08 Jan 2015)

  Changed paths:
    M src/libkstapp/mainwindow.cpp

  Log Message:
  -----------
  Make Zoom/Layout mode consistent between tabs.

Previously, the zoom/layout mode was set on a per-tab basis.
This is almost never what you want, and never what you expect.
Change it so that the zoom/layout mode is the same between tabs.