Add Button Template for common controls

Ability to set up a template for common controls in Remote Design.
For example - Light Control template would consist of button with pre-selected light bulb icons for on/off, pre-selected HA controller, commands for Light On/Light Off. Also part of the template is a slider button for the same Node. Adding template would require to select the Node once for entire template. Once template based control is added the user may tweak individual parameters such as commands or icons. Basically act as an instance of the class that inherits the properties. Templates can be either user defined or SC has some popular presets added to the list of choices.

Currently when setting up a Light you need to select a Node 4 times : 1 for brightness level on the button, 2 and 3 for On/Off commands and 4th time for brightness feedback on the slider.