refactor(ui): Migrate components to ui-next (#4930)

Co-authored-by: Dan Rukas <dan.rukas@gmail.com>

extensions/default/src/Components/LineChartViewport/LineChartViewport.tsx

@@ -1,5 +1,5 @@
 import React from 'react';
-import { LineChart } from '@ohif/ui';
+import { LineChart } from '@ohif/ui-next';
 
 const LineChartViewport = ({ displaySets }) => {
   const displaySet = displaySets[0];

extensions/default/src/Components/ProgressDropdownWithService.tsx

@@ -1,5 +1,5 @@
 import React, { useEffect, useState, useCallback, ReactElement } from 'react';
-import { ProgressDropdown } from '@ohif/ui';
+import { ProgressDropdown } from '@ohif/ui-next';
 
 const workflowStepsToDropdownOptions = (steps = []) =>
   steps.map(step => ({