- Renamed DownloadNotification and removed DownloadState.dismissed dependency
- Improved DynamicDownloadDialog behaviour when scrolling
- DynamicDownloadDialog remains attached to tab until dismissed
- Fixed onTryAgain not working for resumed DownloadDialogs

We were supposed to have removed Experiments for performance purposes.
However, I find some code dangling in the tree.

Experiments.initialize is no longer called so I suspect
Experiments.withExperiment is a no-op. I verified that the lambda
function provided to it never ran in my local geckoBetaDebug on startup.
Assuming experiments behavior doesn't change in other build types, this
change appears safe.

As the bookmark node data is loaded from storage every time the fragment's view is created, when the user navigates to the SelectFolderFragment and returns, the bookmark is loaded once again from storage, replacing the EditText's content (title and URL) which causes the loss of user input.

Validating that the loaded bookmark is different from the one that is already referenced in the fragment avoids unnecessarily replacing the `EditText`s values.

This reverts commit d6676291.

This reverts commit 536921bc.

* added a onTouch listener to scrollview in search fragment to make it disappear on scroll

* fixed lint issues