remove horizontal scrollbar from the node list, update btn text

[gruns]

• remove horizontal scrollbar in the node list. it's displayed all the time, even when all the content fits in the table width and thus the scrollbar is unnecessary

• change Reset Charts to Global to Reset Chars to All Nodes. s/Global/All Nodes

[gruns]

the above are small fixes to bide time until #38 ships, which replaces the chart-sized node list entirely