[5.6] Fix dark theme issues with spy toggle and spy pane (#13345)

[stacey-gammon]

backports #13345

• Fix dark theme issues with spy toggle and spy pane

• Port dark theme portion of styling kuiIcon into uiFramework library

[stacey-gammon]

Build failing but shouldn't have anythign to do with this PR:

18:32:26   1) es/healthCheck/ensureTypesExist() v6 index ignores extra types in index:
18:32:26      expected spy to be called 6 times but was called 5 times
18:32:26     spy(indices.get, { feature: "_mappings", index: "gek" }) => [Promise] {  } at /var/lib/jenkins/workspace/elastic+kibana+pull-request+multijob-intake/src/core_plugins/elasticsearch/lib/ensure_types_exist.js:15:23
18:32:26     spy(indices.putMapping, {
18:32:26   body: { properties: { da: { type: "keyword" } } },
18:32:26   index: "gek",
18:32:26   type: "doc",
18:32:26   update_all_types: true
18:32:26 }) => [Promise] {  } at /var/lib/jenkins/workspace/elastic+kibana+pull-request+multijob-intake/src/core_plugins/elasticsearch/lib/ensure_types_exist.js:51:13
18:32:26 
18:32:26     spy(indices.putMapping, {
18:32:26   body: { properties: { ecuboiha: { type: "integer" } } },
18:32:26   index: "gek",
18:32:26   type: "doc",
18:32:26   update_all_types: true
18:32:26 }) => [Promise] {  } at /var/lib/jenkins/workspace/elastic+kibana+pull-request+multijob-intake/src/core_plugins/elasticsearch/lib/ensure_types_exist.js:51:13
18:32:26 
18:32:26     spy(indices.putMapping, {
18:32:26   body: { properties: { pabopok: { type: "integer" } } },
18:32:26   index: "gek",
18:32:26   type: "doc",
18:32:26   update_all_types: true
18:32:26 }) => [Promise] {  } at /var/lib/jenkins/workspace/elastic+kibana+pull-request+multijob-intake/src/core_plugins/elasticsearch/lib/ensure_types_exist.js:51:13
18:32:26 
18:32:26     spy(indices.putMapping, {
18:32:26   body: { properties: { uco: { type: "boolean" } } },
18:32:26   index: "gek",
18:32:26   type: "doc",
18:32:26   update_all_types: true
18:32:26 }) => [Promise] {  } at /var/lib/jenkins/workspace/elastic+kibana+pull-request+multijob-intake/src/core_plugins/elasticsearch/lib/ensure_types_exist.js:51:13
18:32:26   AssertError: expected spy to be called 6 times but was called 5 times
18:32:26       spy(indices.get, { feature: "_mappings", index: "gek" }) => [Promise] {  } at src/core_plugins/elasticsearch/lib/ensure_types_exist.js:15:23
18:32:26       spy(indices.putMapping, {
18:32:26     body: { properties: { da: { type: "keyword" } } },
18:32:26     index: "gek",
18:32:26     type: "doc",
18:32:26     update_all_types: true
18:32:26   }) => [Promise] {  } at src/core_plugins/elasticsearch/lib/ensure_types_exist.js:51:13
18:32:26   
18:32:26       spy(indices.putMapping, {
18:32:26     body: { properties: { ecuboiha: { type: "integer" } } },
18:32:26     index: "gek",
18:32:26     type: "doc",
18:32:26     update_all_types: true
18:32:26   }) => [Promise] {  } at src/core_plugins/elasticsearch/lib/ensure_types_exist.js:51:13
18:32:26   
18:32:26       spy(indices.putMapping, {
18:32:26     body: { properties: { pabopok: { type: "integer" } } },
18:32:26     index: "gek",
18:32:26     type: "doc",
18:32:26     update_all_types: true
18:32:26   }) => [Promise] {  } at src/core_plugins/elasticsearch/lib/ensure_types_exist.js:51:13
18:32:26   
18:32:26       spy(indices.putMapping, {
18:32:26     body: { properties: { uco: { type: "boolean" } } },
18:32:26     index: "gek",
18:32:26     type: "doc",
18:32:26     update_all_types: true
18:32:26   }) => [Promise] {  } at src/core_plugins/elasticsearch/lib/ensure_types_exist.js:51:13
18:32:26       at Object.fail (node_modules/sinon/lib/sinon/assert.js:90:29)
18:32:26       at failAssertion (node_modules/sinon/lib/sinon/assert.js:51:24)
18:32:26       at Object.assertCallCount [as callCount] (node_modules/sinon/lib/sinon/assert.js:131:21)
18:32:26       at Context.<anonymous> (src/core_plugins/elasticsearch/lib/__tests__/ensure_types_exist.js:210:20)
18:32:26       at undefined.next (native)
18:32:26       at step (src/core_plugins/elasticsearch/lib/__tests__/ensure_types_exist.js:6:1)
18:32:26       at src/core_plugins/elasticsearch/lib/__tests__/ensure_types_exist.js:6:1

jenkins, test this