* Fix typings for nativeValueChange
* Update properties.d.ts
Changed parameter name of nativeValueChange from “target” to “owner”
Fixed white space to match coding style
* Update properties.d.ts
Fixed white space
* fix: crash at application launch on Android P
Reference: https://developer.android.com/preview/restrictions-non-sdk-interfaces
Android P introduces new restrictions on the use of non-SDK interfaces, whether directly, via reflection, or via JNI. These restrictions are applied whenever an app references a non-SDK interface or attempts to obtain its handle using reflection or JNI.
In particular, remove reflection via Class.getDeclaredField() and fallback default transition to fade transition.
* refactor: create default transition based on SDK version
Create default transition and setup default animations based on SDK version.
This is to avoid reflection via Class.getDeclaredMethod() for Android P where it throws.
* refactor: extract isAndroidP method
* feat(view): introduce LayoutChanged event
* test(view): add LayoutChanged event tests
* chore(view-android): attach to onLayoutChange only if listener attached
* feat(view-android): override on/off in order to attach and detach from OnLayoutChangeListener
* feat(tabview): add tab text font size property
* chore(tabview): set tab font size default value
* chore(tabview): move font implementation to widget
* chore(tabview): fix font size get return type
* feat(ios): Added support for css gradients.
* feat(android): Added support for css gradients.
* fix: Fixed gradient borders on ios
* fix(gradient): added backgroundGradient to View and Style.
* fix(ios-gradients): fixed ios gradients covering view content.
* test(gradient): Added ui app tests for background gradients.
* test(gradient): Added a test ensuring background gradient property is applied to style.
* style(gradient): Fixed tslint errors.
* fix(gradient): Removed the background-gradient property and added the gradient to background-image.
* style: fixed a consecutive blank line tslint error.
* fix(tests): fixed the bug that was causing tests to fail.
* chore(linear-gradient): fix equality comparer
* test(gradient): add linear gradients test app
* chore(tslint): update with latest tslint rules
* test(e2e): update modal navigation app
Add layout as root.
Add show modal layout.
* chore(frame): move frame stack modifiers in a separate frame-stack module
* feat(frame): handle back navigation when using common layout as root element
* fix(android/text ios/text): allow -1 to be a valid binding value
Instead of using -1 as special value, use Symbol(-1)
so that it can't be reset accidentally
Closes issue #5559
* renamed the symbol
* feat(list-view): Adds the ability to check whether or not an Item at index is Visible on screen within a listView
* feat(list-view): add the unit-test for checking if list-item is visible.
* clean(list-view): fix invalid reference in list-view-common
* chore(list-view): remove unused logic
* test(list-view) updates the tests for checking if item at index is visible
* chore(ListView Tests): update the test_check_if_item_at_index_is_visible unit test to include 40 children, and test if the last item is visible or not.
* Chore(ListView IOS): Apply requested changes to the for-loop, and replace with Array.some for readability.
* chore(ListView android): Fix TSLint issues.
