Improve default pager call

Author: Bruno Sutic

scripts/variables.sh

@@ -12,7 +12,7 @@ TREE_FOCUS_OPTION="@sidebar-tree-focus"
 TREE_COMMAND="tree -C"
 TREE_COMMAND_OPTION="@sidebar-tree-command"
 
-TREE_PAGER="LESS=\"\" less --dumb --chop-long-lines --tilde --IGNORE-CASE --RAW-CONTROL-CHARS"
+TREE_PAGER="LESS= less --dumb --chop-long-lines --tilde --IGNORE-CASE --RAW-CONTROL-CHARS"
 TREE_PAGER_OPTION="@sidebar-tree-pager"
 
 TREE_POSITION="left"