RFR: 8263385: IGV: Graph is not opened in the window that has focus.

[Koichi Sakata]

On Tue, 18 May 2021 03:01:58 GMT, Koichi Sakata <ksakata at openjdk.org> wrote:

> This pull request enables IGV opens a graph in the window that is focused.
> 
> At the moment IGV opens a graph in the window that has the graph and is found first. So in this pull request I used preferentially the active EditorTopComponent.
> 
> I tested the following scenarios manually:
> 
> 1. Open a graph, open clone, then open another graph (as described in the bug report). It replaces the clone graph with the last opened graph.
> 2. Open a graph, open clone, swap tabs by dragging the clone graph, then open another graph. It replaces the clone graph with the last opened graph.
> 3. Open a graph, open clone, change the focus from the clone graph to the first graph, then open another graph. It replaces the first graph with the last opened graph.
> 4. Open a graph, open clone, open the same graph xml file from the toolbar, open a graph in the second folder, then open a graph in the first folder. It replaces the leftmost graph that was opened the first with the last opened graph.

Thank you for reviewing the whole of this PR, Christian. Your comment indeed encouraged me.
I'll submit a request for merging.

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PR: https://git.openjdk.java.net/jdk/pull/4078