fix(team_alerts): Remove Unassigned from Team Alerts Dropdown (#25213)

* fix(team_alerts): Remove Unassigned from Team Alerts Dropdown and fix Alerts view

Remove Unassigned from Team Alerts Dropdown and fix Alerts view for users that are not part of any teams.

FIXES WOR-762

* changing this back, there's already an alert banner if a user doesn't have access

* add includeUnassigned back and make icon white when selected

* update svg color

* actually fix the color

static/app/components/selectMembers/index.tsx

@@ -42,13 +42,14 @@ const UnassignedWrapper = styled('div')`
 const StyledIconUser = styled(IconUser)`
   margin-left: ${space(0.25)};
   margin-right: ${space(1)};
+  color: ${p => p.theme.gray400};
 `;
 
 const unassignedOption = {
   value: null,
   label: (
     <UnassignedWrapper>
-      <StyledIconUser size="20px" color="gray400" />
+      <StyledIconUser size="20px" />
       {t('Unassigned')}
     </UnassignedWrapper>
   ),
@@ -388,7 +389,15 @@ class SelectMembers extends React.Component<Props, State> {
         onInputChange={this.handleInputChange}
         onChange={this.handleChange}
         value={this.state.options?.find(({value}) => value === this.props.value)}
-        styles={styles}
+        styles={{
+          styles,
+          option: (provided, state: any) => ({
+            ...provided,
+            svg: {
+              color: state.isSelected && state.theme.white,
+            },
+          }),
+        }}
       />
     );
   }