📚 link TODOs to gh issues

Author: etpinard

src/plot_api/plot_api.js

@@ -1693,10 +1693,14 @@ exports.relayout = function relayout(gd, astr, val) {
                 // no test fail when commenting out doAutoRangeAndConstraints,
                 // but I think we do need this (maybe just the enforce part?)
                 // Am I right?
+                // More info in:
+                // https://github.com/plotly/plotly.js/issues/2540
                 subroutines.doAutoRangeAndConstraints,
                 // TODO
                 // can target specific axes,
                 // do not have to redraw all axes here
+                // See:
+                // https://github.com/plotly/plotly.js/issues/2547
                 subroutines.doTicksRelayout,
                 subroutines.drawData,
                 subroutines.finalDraw

src/plot_api/subroutines.js

@@ -525,7 +525,6 @@ exports.drawData = function(gd) {
         }
     }
 
-    // TODO does this break or slow down parcoords??
     clearGlCanvases(gd);
 
     // loop over the base plot modules present on graph

src/plots/cartesian/dragbox.js

@@ -788,7 +788,8 @@ function makeDragBox(gd, plotinfo, x, y, w, h, ns, ew) {
                     .call(Drawing.setScale, 1 / xScaleFactor2, 1 / yScaleFactor2);
 
                 // TODO move these selectAll calls out of here
-                // and stash them somewhere nice.
+                // and stash them somewhere nice, see:
+                // https://github.com/plotly/plotly.js/issues/2548
                 if(hasDraggedPts) {
                     var traceGroups = sp.plot
                         .selectAll('.scatterlayer .trace, .boxlayer .trace, .violinlayer .trace');