Remove fomantic breadcrumb module (#24463)

### File path before/after

<img width="522" alt="Screenshot 2023-05-01 at 13 23 33"
src="https://user-images.githubusercontent.com/115237/235445636-57776038-c98e-4cab-8abe-045138a76958.png">
<img width="522" alt="Screenshot 2023-05-01 at 13 24 08"
src="https://user-images.githubusercontent.com/115237/235445638-70bef62a-1b70-41f8-ba51-728db4d54402.png">


### File edit before/after

<img width="499" alt="Screenshot 2023-05-01 at 13 24 46"
src="https://user-images.githubusercontent.com/115237/235445676-7b3cc23e-289b-40a6-8d4f-0d7fb2efb55e.png">
<img width="497" alt="Screenshot 2023-05-01 at 13 24 52"
src="https://user-images.githubusercontent.com/115237/235445677-db9f3974-8456-46de-a32b-9198110c0540.png">

### Cherry-pick before/after

<img width="590" alt="Screenshot 2023-05-01 at 13 25 30"
src="https://user-images.githubusercontent.com/115237/235445717-99445024-1bb2-46d4-9bd8-8086bad57d34.png">
<img width="582" alt="Screenshot 2023-05-01 at 13 25 37"
src="https://user-images.githubusercontent.com/115237/235445720-9c1dc497-eb23-4e10-a727-27f4d6df69e6.png">

7 files changed, 24 insertions, 170 deletions

diff --git a/web_src/css/base.css b/web_src/css/base.css
index ed51892044..e10d3d1213 100644
--- a/web_src/css/base.css
+++ b/web_src/css/base.css
@@ -332,8 +332,7 @@ progress::-moz-progress-bar {
   user-select: none;
 }
 
-a,
-.ui.breadcrumb a {
+a {
   color: var(--color-primary);
   cursor: pointer;
   text-decoration-skip-ink: all;
@@ -347,8 +346,7 @@ a.muted,
 a:hover,
 a.muted:hover,
 a.muted:hover [class*="color-text"],
-.muted-links a:hover,
-.ui.breadcrumb a:hover {
+.muted-links a:hover {
   color: var(--color-primary);
 }
 
@@ -737,14 +735,6 @@ a.label,
   padding-bottom: 7.42px !important;
 }
 
-.ui.breadcrumb a:hover {
-  text-decoration: underline !important;
-}
-
-.ui.breadcrumb .divider {
-  color: var(--color-text-light-2);
-}
-
 .ui.divider:not(.vertical,.horizontal) {
   border-top-color: var(--color-secondary) !important;
   border-bottom: none !important;
diff --git a/web_src/css/editor.css b/web_src/css/editor.css
index ba35036e4f..62ac915505 100644
--- a/web_src/css/editor.css
+++ b/web_src/css/editor.css
@@ -12,6 +12,12 @@
   border-bottom: 0;
 }
 
+.repo-editor-header {
+  display: flex;
+  margin: 1rem 0;
+  padding: 3px 0;
+}
+
 .editor-toolbar {
   border-color: var(--color-secondary);
 }
diff --git a/web_src/css/index.css b/web_src/css/index.css
index d6ef1da9b9..e01dfb7a73 100644
--- a/web_src/css/index.css
+++ b/web_src/css/index.css
@@ -11,6 +11,7 @@
 @import "./features/projects.css";
 @import "./modules/tippy.css";
 @import "./modules/modal.css";
+@import "./modules/breadcrumb.css";
 @import "./code/linebutton.css";
 @import "./markup/content.css";
 @import "./markup/codecopy.css";
diff --git a/web_src/css/modules/breadcrumb.css b/web_src/css/modules/breadcrumb.css
new file mode 100644
index 0000000000..67830e562a
--- /dev/null
+++ b/web_src/css/modules/breadcrumb.css
@@ -0,0 +1,9 @@
+.breadcrumb .divider {
+  color: var(--color-text-light-2);
+  margin-left: 3px;
+  margin-right: 3px;
+}
+
+.breadcrumb > * {
+  display: inline;
+}
diff --git a/web_src/css/repository.css b/web_src/css/repository.css
index 259cfda3a1..32ff51c920 100644
--- a/web_src/css/repository.css
+++ b/web_src/css/repository.css
@@ -223,11 +223,6 @@
   word-break: break-word;
 }
 
-.repository.file.list .repo-path .section,
-.repository.file.list .repo-path .divider {
-  display: inline;
-}
-
 .repository.file.list #repo-files-table {
   table-layout: fixed;
 }
@@ -448,16 +443,15 @@
   width: 16px;
 }
 
-.repository.file.editor .treepath {
+.repo-editor-header {
   width: 100%;
 }
 
-.repository.file.editor .treepath input {
-  vertical-align: middle;
-  box-shadow: rgba(0, 0, 0, 0.0745098) 0 1px 2px inset;
-  width: inherit;
-  padding: 7px 8px;
-  margin-right: 5px;
+.repo-editor-header input {
+  vertical-align: middle !important;
+  width: auto !important;
+  padding: 7px 8px !important;
+  margin-right: 5px !important;
 }
 
 .repository.file.editor .tabular.menu .svg {
diff --git a/web_src/fomantic/build/semantic.css b/web_src/fomantic/build/semantic.css
index dd6637981b..be6547e47a 100644
--- a/web_src/fomantic/build/semantic.css
+++ b/web_src/fomantic/build/semantic.css
@@ -9,151 +9,6 @@
  *
  */
 /*!
- * # Fomantic-UI - Breadcrumb
- * http://github.com/fomantic/Fomantic-UI/
- *
- *
- * Released under the MIT license
- * http://opensource.org/licenses/MIT
- *
- */
-
-/*******************************
-           Breadcrumb
-*******************************/
-
-.ui.breadcrumb {
-  line-height: 1.4285em;
-  display: inline-block;
-  margin: 0 0;
-  vertical-align: middle;
-}
-
-.ui.breadcrumb:first-child {
-  margin-top: 0;
-}
-
-.ui.breadcrumb:last-child {
-  margin-bottom: 0;
-}
-
-/*******************************
-          Content
-*******************************/
-
-/* Divider */
-
-.ui.breadcrumb .divider {
-  display: inline-block;
-  opacity: 0.7;
-  margin: 0 0.21428571rem 0;
-  font-size: 0.92857143em;
-  color: rgba(0, 0, 0, 0.4);
-  vertical-align: baseline;
-}
-
-/* Link */
-
-.ui.breadcrumb a {
-  color: #4183C4;
-}
-
-.ui.breadcrumb a:hover {
-  color: #1e70bf;
-}
-
-/* Icon Divider */
-
-.ui.breadcrumb .icon.divider {
-  font-size: 0.85714286em;
-  vertical-align: baseline;
-}
-
-/* Section */
-
-.ui.breadcrumb a.section {
-  cursor: pointer;
-}
-
-.ui.breadcrumb .section {
-  display: inline-block;
-  margin: 0;
-  padding: 0;
-}
-
-/* Loose Coupling */
-
-.ui.breadcrumb.segment {
-  display: inline-block;
-  padding: 0.78571429em 1em;
-}
-
-/* Inverted */
-
-.ui.inverted.breadcrumb {
-  color: #DCDDDE;
-}
-
-.ui.inverted.breadcrumb > .active.section {
-  color: #FFFFFF;
-}
-
-.ui.inverted.breadcrumb > .divider {
-  color: rgba(255, 255, 255, 0.7);
-}
-
-/*******************************
-            States
-*******************************/
-
-.ui.breadcrumb .active.section {
-  font-weight: 500;
-}
-
-/*******************************
-           Variations
-*******************************/
-
-.ui.breadcrumb {
-  font-size: 1rem;
-}
-
-.ui.mini.breadcrumb {
-  font-size: 0.78571429rem;
-}
-
-.ui.tiny.breadcrumb {
-  font-size: 0.85714286rem;
-}
-
-.ui.small.breadcrumb {
-  font-size: 0.92857143rem;
-}
-
-.ui.large.breadcrumb {
-  font-size: 1.14285714rem;
-}
-
-.ui.big.breadcrumb {
-  font-size: 1.28571429rem;
-}
-
-.ui.huge.breadcrumb {
-  font-size: 1.42857143rem;
-}
-
-.ui.massive.breadcrumb {
-  font-size: 1.71428571rem;
-}
-
-/*******************************
-         Theme Overrides
-*******************************/
-
-/*******************************
-         Site Overrides
-*******************************/
-/*!
  * # Fomantic-UI - Button
  * http://github.com/fomantic/Fomantic-UI/
  *
diff --git a/web_src/fomantic/semantic.json b/web_src/fomantic/semantic.json
index 3c6f3b7435..06d57a1849 100644
--- a/web_src/fomantic/semantic.json
+++ b/web_src/fomantic/semantic.json
@@ -22,7 +22,6 @@
   "admin": false,
   "components": [
     "api",
-    "breadcrumb",
     "button",
     "card",
     "checkbox",