Decay search improvements

• Each decay "card" now has a checkbox
• The stripping line pill changes colour with the card
• The warning pills are expanded, and their tooltips explain what they mean
• Added filtering by decay head (can only choose from the set of decay heads!)
• Added filtering by already-selected
• New component SelectParticle: essentially a wrapper for react-select that is populated with our particleProperties metadata
• Fixed minor bug in the number of new results loaded in the infinite scroller
• Display total number of results and how many are shown
• Filter decays by tag: Closes #15 (closed)
• Decay selection now persists across changes in filters

changed milestone to %Wizard frontend - user hints

added WP6 - Analysis Preservation & Open Data label

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• 72c4aa56 - be clearer which features are active and which aren't implemented yet

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• d001374e - implement filtering decays by tag

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changed the description

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• e651a92e - use a static method to create options for SelectTag

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• 8c541333 - tooltip at bottom of tag

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• b7d4ceed - preserve selected status across re-renders

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• f5c2dff3 - consistent nomenclature (chosen -> selected)

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merged

mentioned in commit 68a75a73