[xiphos-source] [crosswire/xiphos] f00c58: fix #910 do not show previewer on state change of ...

[karl kleinpaste]

  Branch: refs/heads/master
  Home:   https://github.com/crosswire/xiphos
  Commit: f00c587d72c9f2768a72ee1382c1e4af6edb58c4
      https://github.com/crosswire/xiphos/commit/f00c587d72c9f2768a72ee1382c1e4af6edb58c4
  Author: Karl Kleinpaste <karl at kleinpaste.org>
  Date:   2020-04-18 (Sat, 18 Apr 2020)

  Changed paths:
    M src/gtk/sidebar.c
    M src/main/main.c

  Log Message:
  -----------
  fix #910 do not show previewer on state change of sidebar-or-not, if previewer is not to be shown at all.