tests: Download Image File Modal (#1219)

* E2E Tests: Download Image File Modal

* CI fix

* Fixes for PR comments

* Small change just to check CI behavior

* Fix for CI failure: comparing classes instead of image src

* Fixed Download button test and blocked Download Dialog event

* Deleting file ConnectedViewportDownloadForm.js

This file was not supposed to be created by this PR. It was already deleted by another user on Master branch.

* Removing wrong import line

* Fixes based on PR comments

* Fixes based on PR comments

* test: remove assignment to window

platform/viewer/cypress/support/aliases.js

@@ -11,6 +11,7 @@ export function initCornerstoneToolsAliases() {
   cy.get('.ToolbarRow > :nth-child(10)').as('cineBtn');
   cy.get('.expandableToolMenu').as('moreBtn');
   cy.get('.btn-group > .toolbar-button').as('layoutBtn');
+  cy.get('.viewport-element').as('viewport');
 }
 
 //Creating aliases for Common page elements