* fix button ios color property when textDecoration is applied
* Button ios color set on titleLabel
* Coerce tabView selectedIndex after native items are set
* fix padding on text-view & text-field
text-base is now snapshotable
view.android is now snapshotable
* createNativeView returns the nativeView for android
Fix image tests
Implement test for image loaded from res://
EffectivePaddings updated when nativeView have some from its native theme
* 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
moved some native setters from TabView to TabViewItem.
shorthand properties converters now accounts for unsetValue.
better formatting for test duration.
Resolves#2815
* Gets or sets the number of tabs that should be retained to either side of the current tab in the view hierarchy in an idle state.
* Tabs beyond this limit will be recreated from the TabView when needed.
