ComboChart issues when only 1 value is present, issues with export option/zoom option in toolbar

I am submitting a...

[ ] Feature request
[ ] Design defect
[x] Source code defect
[ ] Demo/documentation defect
[x] Other

charts version:

"@carbon/charts": "^0.41.65", "@carbon/charts-react": "^0.41.65",

Issue description

1)unable to see y axis value when only 1 data point is present https://codesandbox.io/s/adoring-cannon-9vm7q?file=/src/App.js 2)also noticed issues with new toolbar options like a) when we zoom out with Esc button on chrome it resizes the original chart and we need to click twice to zoom in again b) when we zoom in on firefox it doesn't add any padding to the edges: https://codesandbox.io/s/focused-framework-yqonw?file=/src/index.js 3) exporting file in PNG/jpg/csv, can option be added to change the filename? it saves all files with name as myChart? We also need support for pdf format/excel format. Also need to add custom header for the PDF reports and excel sheet name. 4) Toolbar options should have tooltips to indicate what the icons are for. 5) UpdateRangeAxis option not working as expected 6) Seeing datasets in tooltip which are not selected for stacked area-line combo chart 7) stacked area chart- combo chart, not able to see clearly separated areas when legends are selected

Steps to produce the issue

1) add only 1 data point for stacked area type combo chart with value 0 2) a) click on zoom button to zoom in the chart, press Esc to zoom out, check that the chart size is larger than expected, clicking on zoom button again throws error b) click on zoom button in FF 5) zoom in to the extreme right section of the chart where all values are present at lower levels

Current behavior

1)cannot see y axis 0 value 2) cannot zoom out properly with Esc button

Expected behavior

0 should be shown on the y -axis should be able to zoom out with Esc button, should not have to click on zoom button twice zoomed window should have padding in Firefox 5) when updateRangeAxis is set to true, it should auto update the y-axis to make it easier to see the smaller section of the chart

Screenshot or recording

1) cannot see 0 on y-axis when only 1 value is present: when value is 10, can see the y-axis with 0-10 values: when value is 0, can't see anything on y-axis:

2) a)https://user-images.githubusercontent.com/42738420/127308232-375633b7-9b61-4cab-8a5d-7880e70b6380.mp4 2)b) Firefox screen without any padding: 5) updaterangeaxis not updating y-axis Capture1 6) Seeing dataset 3 in tooltip when only dataset 2 is selected. Also when there are multiple points area on stacked area chart is not clearly separated when only some legends are selected. 7) line chart vs combo chart when legends are selected:

carbon-design-system / carbon-charts