Write into Theme-specific settings instead of global ones

[usernamehw]

1. Try to lighten Activity Bar background
2. Switch theme
3. 🐛 The color stayed

So, to iterate, instead of:

"workbench.colorCustomizations": {
    "activityBar.background": "#2f363c"
}

You do

"workbench.colorCustomizations": {
    "[Github]": {
        "activityBar.background": "#2f363c"
    }
}

Where Github is active theme that was modified by the extension.

[usernamehw]

Theme id is from "workbench.colorTheme"

[ryanraposo]

@usernamehw I want to keep the ability to write both generalized & theme-specific customizations to settings, but it has to be without further confusing the 'scoping' process.

Current dev build has this set up. (1) is implementation, (2) is a new setting called codeui.targetingMode, can equal 'general' or 'themeSpecific' and (3) is a statusbar toggle button/indicator for the setting. The two modes have the effect you would expect.

Thoughts?

[usernamehw]

That would work for me.

[ryanraposo]

addressed in 0.2.0