v5.13.0

[New Feature] Added new 'Heat Sink Resistor' component with a bunch of factory variants covering the most common types
[New Feature] Added new 'Dial Scale' variations - 'Ticks + Numeric (0/5.5/11)' a'la Friedman and another variation of 'Ticks' with more pronounced 9/12/3 o'clock indices
[New Feature] Added 'Core' property to 'Radial Inductor' component that allows selection between Ferrite and Air core inductor models'
[New Feature] Added 'Envelope' property to tube symbol components which can be used to display one side of the outer envelope dashed indicating section A or section B of a tube
[New Feature] Added more ceramic resistor variants to 'Resistor' component
[Improvement] Uniformized rendering of components while being dragged
[Improvement] Ability to blank-out previously populated values for unit-type measures, e.g. resistance, capacitance, dimensions, etc
[Improvement] Improved data model for storing transparency alpha and other properties that are edited using a slider widget; as a result, the editing is more precise and does not randomly change to neighboring values
[Improvement] Improved editing experience of integer properties (e.g. number of terminals on a tag strip) by using the spinner text field
[Improvement] Improved logic when moving component(s) that have other components stuck with them; in case there are non-sticky control points within the included components, they will be moved along retaining component shape (e.g. wires or curved traces)
[Improvement] Decommission 'Loadline Editor' option from the File menu