(#358) fix agile glitches rounding and blink

[ryanw-mobile]

Agile screen UI minor fixes:

• Unified current rate tile and rate cells to use the same correct rounding function - provided by KoalaPlot. Our own rounding function is not delivering the expected results and we intended to ditch KoalaPlot, so eventually, we have to fix ours.
• Hoist the blinking text alpha animations at the parent Agile screen level, so all rate cells, when blink, will have the same effects in-sync,

[codacy-production]

Coverage summary from Codacy

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Coverage variation	Diff coverage
❌ -1.96% (target: -1.00%)	✅ 100.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (66a5ab9)	2652	2253	84.95%
Head commit (5eecb95)	2899 (+247)	2406 (+153)	82.99% (-1.96%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#360)	6	6	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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