RegExp issue in non-ES6 environments

The newer version of globalVars uses a revised RegExp as follows:

(/(iPad|iPhone|iPod).* os 9_/ui).test(navigator.userAgent)

The u (unicode) flag is new for ES6. This new RegExp fails to instantiate in older browsers, causing poorIndexedDbSupport not to be detected in, for example, Safari on IOS 9.

```
new RegExp("(iPad|iPhone|iPod).* os 9_", "ui")
SyntaxError: Invalid flags supplied to RegExp constructor.

(/(iPad|iPhone|iPod).* os 9_/ui).test(navigator.userAgent)
SyntaxError: Invalid flag supplied to RegExp constructor.
```
Suggested resolution is to remove the u flag to enable the RegExp to work as expected.

Start from the globalVars code that constructs the user-agent RegExp for poorIndexedDbSupport and check its behavior in a non-ES6 browser such as Safari on iOS 9. Remove the unsupported Unicode flag, then verify that the detection still matches the intended user-agent and no longer raises a syntax error.

Written by the indexing model from the issue text.