Refs #2792: partial responsive design for Datasets main area
Refs #2792: partial responsive design for Charts page
Refs #2792: remove div for clearing, to synchronise visualizations.pt with indicators.pt
Refs #2792: fix bug: wrong style for .label, via Boostrap
Refs #2792: replace inline style with CSS style, for Add (dataset) button
Refs #2792: replace -mini with -xs, for Bootstrap buttons
Refs #2792: proper styles for labels on Datasets page
Refs #2792: add permanent icon for drag&drop functionality, on Datasets page
Refs #2792: replace icon tags (Bootstrap 2) with Glyphicon icons (Bootstrap 3) on Datasets page