add XYplot for 1D-array

[L-A-F]

• new button for XYplot on 1D array
• add xlabel and ylabel in Plotframe
• icon from(https://www.iconfinder.com/icons/131918/analytics_chart_diagram_graph_graphs_line_statistics_xy_icon)

[giumas]

@L-A-F What about the icon requirement to "Free for commercial use (Include link to authors website)"?