[winforms-dotnet5] Move content - Controls

Related to dotnet/docs-desktop#72

When porting and migrating source content (presented as a [link]() that goes to an article), open the source material up. Find out where it exists in the TOC. In the source project #72 navigate down to the **.NET Framework 4 TOC and my notes** collapsible region and expand it. Find the article title in the TOC and review the notes.

- [ ] Controls
- [x] Overview
- [x] Events (#1113)
- [ ] Layout options (add this margin/padding article to existing) ([link](https://docs.microsoft.com/dotnet/desktop/winforms/controls/margin-and-padding-in-windows-forms-controls?view=netframeworkdesktop-4.8))
- [x] Layout options
- [x] Labels
- [x] Custom controls
- [x] Custom painting and drawing
- [ ] Thread-safe calling ([link](https://docs.microsoft.com/dotnet/desktop/winforms/controls/how-to-make-thread-safe-calls-to-windows-forms-controls?view=netframeworkdesktop-4.8))
- [x] Apply accessibility
- [ ] Control reference... (#77)
- [x] Common tasks
- [x] Add a control to a form
- [x] Add create access key shortcuts
- [x] Set the text displayed by a control
- [x] Set the image displayed by a control
- [x] Dock and anchor controls ([link](https://docs.microsoft.com/dotnet/desktop/winforms/controls/how-to-anchor-controls-on-windows-forms?view=netframeworkdesktop-4.8) [link](https://docs.microsoft.com/dotnet/desktop/winforms/controls/how-to-dock-controls-on-windows-forms?view=netframeworkdesktop-4.8))
- [x] Set the tab order for controls ([link](https://docs.microsoft.com/dotnet/desktop/winforms/controls/how-to-set-the-tab-order-on-windows-forms?view=netframeworkdesktop-4.8))

Feedback

- [ ] Postion/Resize a form article had feedback related to position/resize a control within the form. This information is missing from this area and is probably an important concept. Make sure that the following scenarios are handled: creating, moving, sizing, parenting controls at run-time.