Tree view for Host Apps, Overrides, and Runtimes tabs UI

[david-risney]

Merge Host Apps and Overrides tabs together. Host Apps is all 0+ running host app processes. Overrides is 0,1 host app override regardless of if its running or not. But we could still merge them like the taskbar which does the same sort of merging and has both icons for apps that aren't running, aps that are running but aren't pinned to the taskbar, and apps that are both.

This could also allow for pinning and starting apps (for test apps)

Perhaps tree view like:

• executable - overrides, executable file info
  • running process - PID, IL, SDK info
    • running webview2 processes - PID, Runtime info, UDF, crash reports

[david-risney]

On second thought, its still useful to have different views to start with the host apps or start with the override list because it can vary for the different scenario.

Each kind of thing relates directly to another:

• override <-> host app executable
• host app executable <-> host app process
• host app process <-> webview2 SDK
• host app process <-> webview2 runtime
• webview2 runtime <-> webview2 browser process
• webview2 browser process <-> webview2 browser child processes

Override tab

• override
  • host app executable
    • host app process
      • ...

Host apps tab

• host app executable
  • override
  • running process
    • SDK
    • ...

Runtime tab

• webview2 runtime
  • webview2 browser process
    • ...

[david-risney]

The host apps list is now a tree view. I don't think it makes sense to do the rest of the tree view things I was thinking of