[FeatureRequest] Dev Env Settings Window tabs

[janosmurai]

The Dev Env Settings Window should have two tabs:

1. Tool image selection: Here the user can select which tool images to include in the Dev Env.
2. Task settings: Here the user can set that in the context of the given task, which image should be loaded to the container, on which host, and what command to run. (If the task settings UI has not yet been implemented, display a placeholder instead.)

Reference for tabs: Textual - Tabs

The tabs should be navigable with the cursor keys (arrows and vi mode).

Add a new button above the navigation help section before the cancel button.

• On the Tool image selection tab, the button’s text should be next If the user selects this button the Task settings tab should be opened.
• On the Task settings tab, the button’s text should be back. If the user selects this button the Tool image selection tab should be opened.

The UI layout should look like this:

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For axem internal use only:
Jira: https://axem.atlassian.net/browse/DEM-294