Fix: when selecting an edge/node/combo, if another type of element was selected, the corresponding input is reset. This avoids to accidentally delete a previously selected element when another type of element is selected.
Fix: state never get set on first render.
Fix #23: graph has to be re-rendered after dynamic plugin addition so that new elements like hull are drawn.
Fix #22: internal typo in JS function when an error was caught in the graph.
Add input$<graph_ID>-contextmenu to extract the type and id of element which was clicked in the context menu. This can be listened to from the Shiny server function.
Fix layout and behavior issues in some examples: drag_element_force only works when animation is TRUE. Also added autoFit = TRUE wherever required (manual layout vignette).