Instead of needing to click on an SVG element, show popovers on hover. If a user clicks on an SVG element, do not hide the popover.
This also entails adding invisible, event-handling rectangles for each visible bar in the bar graph to accept the mouseover event. The main purpose of this is to alleviate the problem of zero-height bars that would normally not allow the user to see the popover.
Instead of needing to click on an SVG element, show popovers on hover. If a user clicks on an SVG element, do not hide the popover.
This also entails adding invisible, event-handling rectangles for each visible bar in the bar graph to accept the mouseover event. The main purpose of this is to alleviate the problem of zero-height bars that would normally not allow the user to see the popover.