Show node receptor in front of all parameter for instant conversion to input

Currently, we have to right-click a node to convert a parameter to an input, however there is actually space to display the dot in front of all widgets. Why not appear the dot when dragging a connection, or even appear dot only on matching types? This would greatly improve the productivity and iteration speed of users with the node workflow. As with any input parameter, dragging from the socket to create a node would also switch automatically from widget to input. Other nice features can be offered, such as implicitly copying the value. For example, if we create a text node and we already had text in the widget, the text can be copied to the new text widget so that we can resume our work from there, quickly externalizing some content into a different node.