## Related links
* Bug: #6438
* Component: [Dialogs](https://github.com/material-components/material-components-ios/tree/develop/components/Dialogs)
## Introduction
As we move to theming extensions all components that have a theming extension should use that within it's examples. Currently MDCAlertController has a theming extension and should use it in all examples. Additionally all components within the examples that have a theming extension should use it.
## The problem
Within MDCAlertController examples some components are using the old _Themers_.
## The fix
For all components being used in MDCAlertController examples use a theming extension if available.
## Additional notes
This also cleans up some ivar usage and import statements.
### Context
All of our theming targets should be `MDC<#Component>+Theming` but all files should be `MDC<#Component>+MaterialTheming.m/h`. We got out of sync and caught this early.
### The problem
Our targets and file names weren't correct in some cases
### The fix
Update our targets and files to be what we have decided as a team.
