Update copy on site based on living copy document (#697)

* Update copy on site based on living copy document

* Updates copy from living doc v2

- updates shots

* Update styling to sidepanel

- make indicator heading white
- change bg color of add'nl indicators 'FAFAFA'

* Separate dataset cards sections by style

- abstract out additional cards color to utils
- create a baseCard mixin
- add datasetCardAdditional style block
- add additionalIndicator prop to DatasetCard
- lower abstaction of GridContainer from methodology to DatasetContainer
- updates snapshot

* Swap resolution and source in dataset cards

- update snapshots

* Update SVGs on About page

- re-center the SVGs to content vertically

client/src/components/DatasetCard/tests/__snapshots__/datasetCard.test.tsx.snap

@@ -6,20 +6,11 @@ exports[`rendering of the DatasetCard checks if component renders 1`] = `
     <h3>
       Area Median Income
     </h3>
-    <div>
-      What is it?
-    </div>
     <div>
       Median income of the census block group calculated as a percent 
     of the metropolitan area’s or state's median income.
     </div>
     <ul>
-      <li>
-        <span>
-          Data resolution: 
-        </span>
-        Census block group
-      </li>
       <li>
         <span>
           Data source: 
@@ -32,6 +23,12 @@ exports[`rendering of the DatasetCard checks if component renders 1`] = `
           Census's American Community Survey
         </a>
       </li>
+      <li>
+        <span>
+          Data resolution: 
+        </span>
+        Census block group
+      </li>
       <li>
         <span>
           Data date range: