Multi-selection of files and folders

What's Changed

• Enable Long tap gesture for files and folders on all screens by @ankitgoyalgloballogic in #604
• Show selected elements count by @ankitgoyalgloballogic in #605
• update list UI on cell selection by @ankitgoyalgloballogic in #606
• Added Action sheet to perform operations on multi selected items by @ankitgoyalgloballogic in #607
• Fixed iOS issues by @ankitgoyalgloballogic in #609
• fixed crash while re-signing on workflow detail by @ankitgoyalgloballogic in #608
• move multiple files by @ankitgoyalgloballogic in #610
• start workflow with multiple attachments by @ankitgoyalgloballogic in #611
• fixed screen rotation issue by @ankitgoyalgloballogic in #612
• Add Remove offline to multiple nodes by @ankitgoyalgloballogic in #613
• Multiple delete files and folders by @ankitgoyalgloballogic in #614
• Add/Remove favourites selected items. by @ankitgoyalgloballogic in #615
• Accessibility issues for multi-select by @ankitgoyalgloballogic in #616
• localized strings added for the release by @ankitgoyalgloballogic in #617

Full Changelog: 1.7.0...1.8.0-M1