- set select icon for only_input field as well

we are setting admin as current user, At time of request handling if
frappe.db is not set. fixed that issue by adding a check.

Auth flow is changed to use login attempt tracker.

Existing login attempt tracker is a set of funcions those are not easy
to understand. Created a tracker class that handles all tracker logic and provides
useful methods to access.

Testcases added for the same.

perf: optimise set_cors_headers

fix: Changed order of renaming custom script patch

Revert "fix: patch travis"

fix: patch travis

docs: update docs of some most used functions

fix: Resource not available error on Purchase Order get items

fix: Unknow column `home_settings`  on migrate from old version.

feat: replace localStorage with localforage for storing drafts

fix: leaderboard not work when lang is not English