Related tdf#82087: hyphenation: allow 1 character at line begin

The default "Characters at line begin" value is still 2
in Paragraph Styles->Text Flow, but now it's possible to set 1, too.

See end of comment here:
https://bugs.documentfoundation.org/show_bug.cgi?id=82087#c22

Change-Id: Ib10e8a919715666214c7e4ac19f1506f111a6519
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/137937
Tested-by: Jenkins
Tested-by: László Németh <nemeth@numbertext.org>
Reviewed-by: László Németh <nemeth@numbertext.org>
diff --git a/cui/uiconfig/ui/textflowpage.ui b/cui/uiconfig/ui/textflowpage.ui
index 507557ab..1be6c04 100644
--- a/cui/uiconfig/ui/textflowpage.ui
+++ b/cui/uiconfig/ui/textflowpage.ui
@@ -21,7 +21,7 @@
    <property name="page_increment">10</property>
  </object>
  <object class="GtkAdjustment" id="adjustment4">
    <property name="lower">2</property>
    <property name="lower">1</property>
    <property name="upper">9</property>
    <property name="value">2</property>
    <property name="step_increment">1</property>