ref(toolbar) Move getButtons to functions (#13502)
Move visible logic inside each button
Move click functionality inside each button
Extract getButtons function from Toolbox components to functions file
feat(toolbar-button-clicked) Enhance toolbar buttons with notify click
- add possibility to allow execution of the button's routine besides triggering
`toolbarButtonClicked` API event
- keep backwards compatibility
- get rid of `ToolbarButton`
feat(toolbox) allow any toolbox button to be displayed in main toolbar (#9488)
* feat(toolbox) allow any toolbox button to be displayed as main
fixes the previous behaviour where only a certain set of buttons were whitelisted for being displayed in the main toolbar
* code review
* code review - fix avatar icon position