fix #2054 by removing ticks max limitation

frontend/apps/reader/modules/readerfooter.lua

@@ -38,7 +38,6 @@ local ReaderFooter = InputContainer:new{
     pageno = nil,
     pages = nil,
     toc_level = 0,
-    max_ticks = 100,
     progress_percentage = 0.0,
     progress_text = nil,
     text_font_face = "ffont",
@@ -327,9 +326,7 @@ function ReaderFooter:_updateFooterText()
             local max_level = self.ui.toc:getMaxDepth()
             for i = 0, -max_level, -1 do
                 local ticks = self.ui.toc:getTocTicks(i)
-                if #ticks < self.max_ticks then
-                    table.insert(ticks_candidates, ticks)
-                end
+                table.insert(ticks_candidates, ticks)
             end
             -- find the finest toc ticks by sorting out the largest one
             table.sort(ticks_candidates, function(a, b) return #a > #b end)