Change the style of the resize bar at the bottom of the print setup panel

Make it wider and more visible to the user.
Change icon.
Keep margins according to the other panels.

resources/qml/PrintSetupSelector/PrintSetupSelectorContents.qml

@@ -104,7 +104,7 @@ Item
     {
         id: buttonRow
         property real padding: UM.Theme.getSize("default_margin").width
-        height: childrenRect.height + 2 * padding
+        height: recommendedButton.height + 2 * padding
 
         anchors
         {
@@ -149,9 +149,8 @@ Item
                 left: parent.left
                 right: parent.right
                 bottom: parent.bottom
-                top: recommendedButton.bottom
-                topMargin: UM.Theme.getSize("default_lining").height
             }
+            height: childrenRect.height
             cursorShape: Qt.SplitVCursor
             visible: currentModeIndex == PrintSetupSelectorContents.Mode.Custom
             drag
@@ -182,15 +181,29 @@ Item
                 }
             }
 
-            UM.RecolorImage
+            Rectangle
             {
-                width: parent.width * 0.05
-                height: parent.height * 0.3
+                width: parent.width
+                height: UM.Theme.getSize("narrow_margin").height
+                color: UM.Theme.getColor("secondary")
 
-                anchors.centerIn: parent
+                Rectangle
+                {
+                    anchors.bottom: parent.top
+                    width: parent.width
+                    height: UM.Theme.getSize("default_lining").height
+                    color: UM.Theme.getColor("lining")
+                }
 
-                source: UM.Theme.getIcon("grip_lines")
-                color: UM.Theme.getColor("lining")
+                UM.RecolorImage
+                {
+                    width: UM.Theme.getSize("drag_icon").width
+                    height: UM.Theme.getSize("drag_icon").height
+                    anchors.centerIn: parent
+
+                    source: UM.Theme.getIcon("resize")
+                    color: UM.Theme.getColor("small_button_text")
+                }
             }
         }
     }

resources/themes/cura-light/icons/grip_lines.svg

@@ -1,4 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 30 6">
-    <rect width="30" height="2" rx="1" ry="1" />
-    <rect width="30" height="2" rx="1" ry="1" y="4" />
-</svg>

resources/themes/cura-light/icons/resize.svg

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="17px" height="3px" viewBox="0 0 17 3" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <!-- Generator: Sketch 52.2 (67145) - http://www.bohemiancoding.com/sketch -->
+    <title>Group</title>
+    <desc>Created with Sketch.</desc>
+    <g id="Print-settings" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="1024_custom--1-ex-copy" transform="translate(-773.000000, -643.000000)" fill="#999999">
+            <g id="Group" transform="translate(773.000000, 643.000000)">
+                <circle id="Oval" cx="1.5" cy="1.5" r="1.5"></circle>
+                <circle id="Oval-Copy" cx="8.5" cy="1.5" r="1.5"></circle>
+                <circle id="Oval-Copy-2" cx="15.5" cy="1.5" r="1.5"></circle>
+            </g>
+        </g>
+    </g>
+</svg>

resources/themes/cura-light/theme.json

@@ -442,6 +442,7 @@
         "print_setup_slider_tickmarks": [0.32, 0.32],
         "print_setup_big_item": [28, 2.5],
         "print_setup_icon": [1.2, 1.2],
+        "drag_icon": [1.416, 0.25],
 
         "expandable_component_content_header": [0.0, 3.0],