Search bar functionality

[ww7]

Search bar have a minimal usability for now
Suggest:

• Esc for reset and remove focus
• Crtl+D for reset without focus on search bar
• in field button × for reset
• keys ↓↑ for navigate filtered notes (additionally to Ctrl+J/K )
• Ctrl+K (↑) loop navigation (navigate from first to last)
• dropdown suggestion list, especially for #tags

[kazup01]

+1

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[Flexo013]

One of all these functionalities is addressed in #3205