* (fix) Allow Span descendants in FormattedString
Currently FormattedString doesn't allow custom components extending Span to be its children. This small PR fixes that.
Closes#7369.
* Remove the now unused CHILD_SPAN
TKUnit default message change to empty string
isSet method is now instance method of Property classes
fix detaching from parent bindingContext - were using oldParent.parent instead of parent
editable-text-base.android - onTextChanged implementation commented. Does nothing.
frame - onCreateView wrapped in try/catch and shows label with exception message if any
text-base.android - should support reset of nativeView. TransformationMethod won’t be set if TextField is secure
Change some types to their string couterparts
TextField.android won’t support multilines anymore in order to work as iOS
In android when page is removed from native backstack we won’t call tearDownUI again a second time
* Fix formattedText implementation for iOS
Fix typeof undefined checks
Add slow tests message
Improve tests speed
* fix tslint
reduce transitions duration in test
* waitUntilReady will throw if timeout
fix tests that needs to wait without throwing
improve test speed
* Remove Bindable.
Fix Observable & ObservableArray tests
Fix formattedString text
Change implementation of Span, FormattedString & TextBase
properties valueChange called before native setter
* revetred formattedString tests asserts - formattedText update text property again
properties - when getting value we now use always property name instead of key (using key could return undefined for property that is set to its default value)
updated fontSize & fontInternal properties on all controls
fix font properties so that fontInternal is reset if the new font is the same as Font.default
* fix tslint errors
