Change skim mode menu & dialog title (#4223)

frontend/apps/reader/modules/readergoto.lua

@@ -7,7 +7,7 @@ local _ = require("gettext")
 
 local ReaderGoto = InputContainer:new{
     goto_menu_title = _("Go to"),
-    skim_menu_title = _("Skim to"),
+    skim_menu_title = _("Skim document"),
 }
 
 function ReaderGoto:init()

frontend/apps/reader/skimtowidget.lua

@@ -61,12 +61,10 @@ function SkimToWidget:init()
             },
          }
     end
-    local dialog_title
+    local dialog_title = _("Skim")
     if self.document.info.has_pages then
-        dialog_title = _("Go to Page")
         self.curr_page = self.ui.paging.current_page
     else
-        dialog_title = _("Go to Location")
         self.curr_page = self.document:getCurrentPage()
     end
     self.page_count = self.document:getPageCount()