Add spinner and load error indicator to DrawerSequenceView (#733)

Plus, remove environment check when displaying sequence view
12 jobs for master in 6 minutes and 53 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Test Build Static
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Test_N_Build

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Test_N_Build:internal

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  Build Docker Images
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Node:Internal

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Node:Live

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  Deploy
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Internal:HL

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Internal:HX

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Live:HL

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Live:HX

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Pub:Internal-HL

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Pub:Live-HL

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