Symbols plugin has redundant header

[danirabbit]

The label "Symbols" and the ability to collapse that header doesn't seem terribly useful.

[tintou]

Note: this is currently used as a workaround for delaying the loading of the tree. At document change, the whole tree is recreated and the root "symbols" is then added.

[jeremypw]

No obvious way to fix this. There has to be a root item and there is no obvious unique candidate within the code (there could be more than one namespace). Using the name of the file would be equally redundant with the tab name and now the pane is on the right it at least shows the pane's function.

Please re-open if a solution suggests itself.