Github user moranr commented on the issue:
https://github.com/apache/nifi/pull/604
For **NIFI-2038**
* For #header .component-button, height and width properties are declared
twice at 40px and 56px. Should only be 56px
* Icons (#header .icon and #header .fa) should be 32px (ââNIFI-2037)
* Looks like #header .icon âwill need padding-left:6px added to center
them within the buttonâs (once size is updated to 32px)â
* The version of each icon with a plus should display on hover. Currently
it only shows once you start dragging
* When button is click and while dragging, set cursor to cursor:grabbing
See mockup as example (nifi-drag-drop-component.png)

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