Better log viewing status information

[tlmii]

It can be hard to tell what state the Container/Project logs pages are in. Is it actually watching the logs? Is it waiting for the project to start? So this PR takes a first stab at adding some state information here:

1. The State of Projects/Containers are displayed within the dropdown IIF they're not Running.
2. A status message is displayed next to the dropdown with an initial set of statuses as the page loads, containers/projects are discovered, logs become available, log watching starts, etc.
3. The old InitialText from the LogViewer is removed in favor of the above status info.
4. Simplified the Clear/Cancel/Dispose code when the selected container/project changes
5. Fixed a bug in the timestamp detection

Note: There appears to be a bug where the text of the selected item in the FluentSelect doesn't update when the underlying option changes (e.g. when the current selected text changes from "myfrontend (Unknown State)" to "myfrontend", the value of the option in the dropdown list changes, but the displayed selected value does not). I haven't gotten a simple repro of that yet, but will file a bug on it. @vnbaaij FYI on that, I'm not sure if it is in FluentUI-Blazor or in the underlying web components (I think it might be the latter).

[tlmii]

It's kind of unfortunate that we don't have an actual state value when things are starting up.

[smitpatel]

We dont need this code anymore?

[tlmii]

It's not needed at that point anymore because it is done when the drop down selection changes. So it's still done, just earlier in the process.