Improve tab+keyboard accesibility

The main features on Gaucho should be accessible using tab to navigate around the buttons. The style of the highlight should be in accordance with the rest of the application (and taking in account is a Desktop app)

Some things to consider:
- [x] By default, no button should be highlighted, and they should not highlight when using the mouse, only when tabbing.
- [ ] When tabbing through a suite, the task should be selected, to show the logs/edit
- [x] When the `command` input is selected in edit mode, the tab won't jump to the next element, this is a feature explicitly added, but, unless a solution is found, should be removed to improve accessibility.
- [ ] Some default highlights are disabled in the css as they didn't work properly, enable to start working on this

This is a long issue that may be split in several tasks if needed