Molecular Constructor

3/8/2019

* Added a file manager: you can create folders now (yay!)
* Added two-finger rotation and panning
* Added "Add" menu item
* Changed molecule insertion procedure
* Improved bond editing, removed bond popup
* Removed "Dragging" menu item and double-tap gesture
* Atom popup shows up faster
* Limited undo/redo history
* Added Mn and Na-C bond
* Increased maximum valence for boron to 4
* Fixed some bugs that caused app crashes
* Minor UI improvements