SSDM-7071: Turning many dropdowns to seleclt2 dropdowns

...as/webapps/eln-lims/html/js/controllers/MainController.js

...ugins/eln-lims/1/as/webapps/eln-lims/html/js/util/Util.js

...pps/eln-lims/html/js/views/DataSetForm/DataSetFormView.js

...lims/html/js/views/ExperimentTable/ExperimentTableView.js

...pps/eln-lims/html/js/views/ProjectForm/ProjectFormView.js

...eln-lims/html/js/views/SampleForm/SampleFormController.js

...bapps/eln-lims/html/js/views/SampleForm/SampleFormView.js

...ps/eln-lims/html/js/views/SampleForm/widgets/LinksView.js

...pps/eln-lims/html/js/views/SampleTable/SampleTableView.js

...-lims/html/js/views/SampleTable/widgets/MoveSampleView.js

...lims/html/js/views/SampleTable/widgets/TypeAndFileView.js

...-lims/html/js/views/StorageManager/widgets/StorageView.js

.../webapps/eln-lims/html/js/views/legacy/SampleHierarchy.js