t-SNE lasso options improvement

[karishma-gangwani]

'List samples' and 'show samples' seems too similar. since list samples is still on the t-SNE sandbox but show samples opens the sample view we can improve the label as 'show samples in sample view'. Moreover, 'add to a group and filter' can read as 'add to a GROUP as well as FILTER' or 'add to a GROUP and FILTER both' for better readability since both events are occuring simultaneously and highlights the main tabs where the grouping and filtering will be.