[fix] Data Import Tool: handle datetime parsing

[fix] Set new docname after creating via link field

Fixes #1607

Fixes frappe/erpnext#4874

[fix] image parsing in email

Onload in Report

[redesign] do not allow re organizing fields via customize form

[Fixes] Transaltion not working for english lang, title of transaltion set to language_code

Fix table header background color in pdf view

wkhtmltopdf removes div/th background color
reference: http://stackoverflow.com/questions/25118343/wkhtmltopdf-div-background-color

	background-color: #eee !important; //will fix the problem in Modern Print Pdf View

Check this url

Table Header border is comming in print priview
https://demo.erpnext.com/api/method/frappe.templates.pages.print.download_pdf?doctype=Sales%20Invoice&name=%5BSelect%5D00024&format=Standard&no_letterhead=0

but Table Header background color is removed in pdf
https://demo.erpnext.com/print?doctype=Sales%20Invoice&name=%5BSelect%5D00024&format=Standard&no_letterhead=0