var to let for true blockscoping

...eb/reports/static/reports/app/directives/addReportItem.js

.../reports/static/reports/app/directives/aliasExperiment.js

...reports/static/reports/app/directives/buttonDeleteItem.js

...reports/static/reports/app/directives/buttonExportItem.js

...b/reports/static/reports/app/directives/buttonSettings.js

beat/web/reports/static/reports/app/directives/item.js

...web/reports/static/reports/app/directives/myReportInfo.js

.../reports/static/reports/app/directives/saveReportItems.js

beat/web/reports/static/reports/app/directives/sortData.js

...web/reports/static/reports/app/directives/tableDynamic.js

...b/reports/static/reports/app/directives/tablePrecision.js

beat/web/reports/static/reports/app/directives/theColumn.js

beat/web/reports/static/reports/app/factories/dataFactory.js

...eb/reports/static/reports/app/factories/plotterFactory.js

...web/reports/static/reports/app/factories/reportFactory.js