JS: Update and fix docs, fix Number.toString() with decimals (#4168)

* Update and fix JS docs

This could really use some automation, atleast for API reference
There are TypeScript definitions and typedocs, we don't need to be monkeys copying and reformatting this to API reference by hand

* Fix bugged character

* JS: Fix Number.toString() with decimals

* Fix

* Forgot this one

* docs: mention per-view child format

* Added @portasynthinca3 to docs' codeowners

* Updated CODEOWNERS

---------

Co-authored-by: Anna Antonenko <portasynthinca3@gmail.com>
Co-authored-by: hedger <hedger@nanode.su>
Co-authored-by: hedger <hedger@users.noreply.github.com>

documentation/js/js_gui.md

@@ -173,6 +173,11 @@ triggered when the back key is pressed.
 
 <br>
 
+### viewDispatcher.currentView
+The `View` object currently being shown.
+
+<br>
+
 ## ViewFactory
 When you import a module implementing a view, a `ViewFactory` is instantiated. For example, in the example above, `loadingView`, `submenuView` and `emptyView` are view factories.
 
@@ -183,8 +188,40 @@ Creates an instance of a `View`.
 
 <br>
 
-### ViewFactory.make(props)
-Creates an instance of a `View` and assigns initial properties from `props`.
+### ViewFactory.makeWith(props, children)
+Creates an instance of a `View` and assigns initial properties from `props` and optionally a list of children.
 
 **Parameters**
   - `props`: simple key-value object, e.g. `{ header: "Header" }`
+  - `children`: optional array of children, e.g. `[ { element: "button", button: "right", text: "Back" } ]`
+
+## View
+When you call `ViewFactory.make()` or `ViewFactory.makeWith()`, a `View` is instantiated. For example, in the example above, `views.loading`, `views.demos` and `views.empty` are views.
+
+<br>
+
+### View.set(property, value)
+Assign value to property by name.
+
+**Parameters**
+  - `property`: name of the property to change
+  - `value`: value to assign to the property
+
+<br>
+
+### View.addChild(child)
+Adds a child to the `View`.
+
+**Parameters**
+  - `child`: the child to add, e.g. `{ element: "button", button: "right", text: "Back" }`
+
+The format of the `child` parameter depends on the type of View that you're working with. Look in the View documentation.
+
+### View.resetChildren()
+Removes all children from the `View`.
+
+### View.setChildren(children)
+Removes all previous children from the `View` and assigns new children.
+
+**Parameters**
+  - `children`: the array of new children, e.g. `[ { element: "button", button: "right", text: "Back" } ]`