Update the messaging in the GitHub panel when a solution is not open

[drguthals]

When a solution isn't open, the messaging in the GitHub panel is:

But there is no such menu item when there is no open solution:

If there is no open solution, we should change the messaging to "Go to Team Explorer and open a solution" or something along those lines.

[meaghanlewis]

I believe this messaging just shows in VS2017. With VS2015, the last opened solution stays open after restarting VS and until a new solution is selected.

[meaghanlewis]

The message looks like it is defined here:

VisualStudio/src/GitHub.VisualStudio.UI/Resources.resx

Line 328 in 0bf5d88

<value>We couldn't find a git repository here. Open a git project or click "File -&gt; Add to Source Control" in a project to get started.</value>

[micheleissa]

Hello,
I can take this one. Do you guy just want the verbiage to change?
@sguthals could you also take a look at my comment on #1299

-Eissa

[meaghanlewis]

Hi @micheleissa that would be great if you can update this! Yes, we just want the message to be simplified to say something like Open a git project or solution to get started. Feel free to open a PR with the change and we'll review it.

[mariombaltazar]

Hi,
Is this issue still open?

[GuillemSeCa]

Is this issue still open should I work on it?