correct blur on copied and pasted elements, correct dasharray attribute, fixed error with strokes

src/js/PaintBox.js

@@ -78,7 +78,7 @@ MD.PaintBox = function(container, type){
     const elem = selectedElems[0];
     // fill or stroke
     var url = elem.getAttribute(type);
-    if (url.includes("(")) {
+    if (url && url.includes("(")) {
       url = url.split("(")[1].split(")")[0];
     }
     // not a gradient

src/js/Panel.js

@@ -182,6 +182,17 @@ MD.Panel = function(){
  
       if (elem !== null) {
         $("#stroke_panel").show();
+        $('#stroke_width').val(elem.getAttribute("stroke-width") || 0);
+        // stroke style
+        const strokeStyle = elem.getAttribute("stroke-dasharray") || "none";
+        const strokeStyles = {
+          "none": "—",
+          "2,2": "...",
+          "5,5": "- -",
+          "5,2,2,2": "-·-",
+          "5,2,2,2,2,2": "-··-"
+        };
+        $("#stroke_style_label").html(strokeStyles[strokeStyle] || "—");
         var elname = elem.nodeName;
         var angle = svgCanvas.getRotationAngle(elem);
         $('#angle').val(Math.round(angle));

src/js/svgcanvas.js

@@ -7213,15 +7213,13 @@ this.setPaintOpacity = function(type, val, preventUndo) {
 // elem - The element to check the blur value for
 this.getBlur = function(elem) {
   var val = 0;
-//    var elem = selectedElements[0];
-  
+
   if(elem) {
     var filter_url = elem.getAttribute('filter');
     if(filter_url) {
-      var blur = getElem(elem.id + '_blur');
-      if(blur) {
-        val = blur.firstChild.getAttribute('stdDeviation');
-      }
+      const selector = filter_url.split("url(#")[1].slice(0, -1);
+      var blur = getElem(selector);
+      if (blur) val = blur.firstChild.getAttribute('stdDeviation');
     }
   }
   return val;