In a previous project, I created a custom tab that contains one button that opens a dockpane docked with esri_core_contentsDockPane. In a completely separate C# project, I want to create a new button and add it to the same custom tab. The goal is to have a custom tab for all of our organization's tools - we don't want them in the "Add-In" tab - and to be able to have different programmers add their tools to this custom tab.
Can someone explain the best way to do this with an example config.daml file if possible. Thanks!