Improve "Navigate by" layout

Implemented some suggestions from https://freedomsponsors.org/issue/391/navigation-button-icon-does-not-scale-and-gets-cut-off#comment-917
* Place the up/down arrows on the right of the button
* Use up/down arrows instead of right/left
* Added a separator between the navigation buttons and the search label

Change-Id: I509756db2fc0c1f60a6b1d6f14e6ed9299d7e597
Reviewed-on: https://gerrit.libreoffice.org/10613Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>

icon-themes/tango/links.txt

@@ -262,20 +262,20 @@ res/lc06301.png cmd/lc_navigateback.png
 cmd/lc_browsebackward.png cmd/lc_navigateback.png
 cmd/lc_previouspage.png cmd/lc_navigateback.png
 cmd/lc_pageup.png cmd/lc_navigateback.png
-cmd/lc_scrolltoprevious.png cmd/lc_navigateback.png
+cmd/lc_scrolltoprevious.png cmd/lc_upsearch.png
 svtools/res/back_large.png cmd/lc_navigateback.png
 res/sc06301.png cmd/sc_navigateback.png
 cmd/sc_browsebackward.png cmd/sc_navigateback.png
 cmd/sc_previouspage.png cmd/sc_navigateback.png
 cmd/sc_pageup.png cmd/sc_navigateback.png
-cmd/sc_scrolltoprevious.png cmd/sc_navigateback.png
+cmd/sc_scrolltoprevious.png cmd/sc_upsearch.png
 svtools/res/back_small.png cmd/sc_navigateback.png
-cmd/lc_scrolltonext.png cmd/lc_navigateforward.png
+cmd/lc_scrolltonext.png cmd/lc_downsearch.png
 cmd/lc_browseforward.png cmd/lc_navigateforward.png
 cmd/lc_pagedown.png cmd/lc_navigateforward.png
 cmd/lc_nextpage.png cmd/lc_navigateforward.png
 res/lc06300.png cmd/lc_navigateforward.png
-cmd/sc_scrolltonext.png cmd/sc_navigateforward.png
+cmd/sc_scrolltonext.png cmd/sc_downsearch.png
 cmd/sc_browseforward.png cmd/sc_navigateforward.png
 cmd/sc_pagedown.png cmd/sc_navigateforward.png
 cmd/sc_nextpage.png cmd/sc_navigateforward.png

sw/uiconfig/swriter/toolbar/findbar.xml

@@ -27,8 +27,9 @@
   <toolbar:toolbarseparator/>
   <toolbar:toolbaritem xlink:href=".uno:SearchDialog"/>
   <toolbar:toolbarseparator/>
-  <toolbar:toolbaritem xlink:href=".uno:ScrollToPrevious"/>
   <toolbar:toolbaritem xlink:href=".uno:NavigationPopup"/>
   <toolbar:toolbaritem xlink:href=".uno:ScrollToNext"/>
+  <toolbar:toolbaritem xlink:href=".uno:ScrollToPrevious"/>
+  <toolbar:toolbarseparator/>
   <toolbar:toolbaritem xlink:href=".uno:SearchLabel"/>
 </toolbar:toolbar>