bookstatus(minor): read setting only once

frontend/ui/widget/bookstatuswidget.lua

@@ -61,17 +61,13 @@ function BookStatusWidget:init()
     }
     self:getStatisticsSettings()
     if self.settings then
-        if self.settings:readSetting("summary") ~= nil then
+        self.summary = self.settings:readSetting("summary") or {
-            self.summary = self.settings:readSetting("summary")
-        else
-            self.summary = {
             rating = nil,
             note = nil,
             status = "",
             modified = "",
         }
     end
-    end
 
     self.small_font_face = Font:getFace("ffont", 15)
     self.medium_font_face = Font:getFace("ffont", 20)