Add quick save snapshot and default snapshot buttons

Hi all

- please add a button on the chart panel to quickly save a snapshot applied to the chart.

(i.e. to save changes without going to the settings, without searching among the list of snapshots and without resaving the snapshot - just make a button to quickly save changes in the snapshot).

- and the second is to make it possible to quickly open a snapshot of a graph to a tool. (i.e. make it possible to assign a default snapshot for each tool and use one button on the panel to open it when opening a tool).

Because when there are 30 tools in the list and you need to open each tool, select a snapshot, change something and then resave it takes a lot of time.