Improve the appearance of project panel filename editor

* Always layout single-line editors with a fixed height
* Preserve directory chevron when editing folder names
* Allow theming the filename editor

Co-authored-by: Antonio Scandurra <me@as-cii.com>

assets/keymaps/default.json

@@ -331,7 +331,8 @@
         "context": "ProjectPanel",
         "bindings": {
             "left": "project_panel::CollapseSelectedEntry",
-            "right": "project_panel::ExpandSelectedEntry"
+            "right": "project_panel::ExpandSelectedEntry",
+            "f2": "project_panel::Rename"
         }
     }
 ]

assets/themes/cave-dark.json

@@ -972,6 +972,18 @@
           "size": 14
         }
       }
+    },
+    "filename_editor": {
+      "background": "#26232a5c",
+      "text": {
+        "family": "Zed Mono",
+        "color": "#e2dfe7",
+        "size": 14
+      },
+      "selection": {
+        "cursor": "#576ddb",
+        "selection": "#576ddb3d"
+      }
     }
   },
   "chat_panel": {

assets/themes/cave-light.json

@@ -972,6 +972,18 @@
           "size": 14
         }
       }
+    },
+    "filename_editor": {
+      "background": "#e2dfe72e",
+      "text": {
+        "family": "Zed Mono",
+        "color": "#26232a",
+        "size": 14
+      },
+      "selection": {
+        "cursor": "#576ddb",
+        "selection": "#576ddb3d"
+      }
     }
   },
   "chat_panel": {

assets/themes/dark.json

@@ -972,6 +972,18 @@
           "size": 14
         }
       }
+    },
+    "filename_editor": {
+      "background": "#ffffff1f",
+      "text": {
+        "family": "Zed Mono",
+        "color": "#f1f1f1",
+        "size": 14
+      },
+      "selection": {
+        "cursor": "#2472f2",
+        "selection": "#2472f23d"
+      }
     }
   },
   "chat_panel": {

assets/themes/light.json

@@ -972,6 +972,18 @@
           "size": 14
         }
       }
+    },
+    "filename_editor": {
+      "background": "#0000000f",
+      "text": {
+        "family": "Zed Mono",
+        "color": "#2b2b2b",
+        "size": 14
+      },
+      "selection": {
+        "cursor": "#2472f2",
+        "selection": "#2472f23d"
+      }
     }
   },
   "chat_panel": {

assets/themes/solarized-dark.json

@@ -972,6 +972,18 @@
           "size": 14
         }
       }
+    },
+    "filename_editor": {
+      "background": "#0736425c",
+      "text": {
+        "family": "Zed Mono",
+        "color": "#eee8d5",
+        "size": 14
+      },
+      "selection": {
+        "cursor": "#268bd2",
+        "selection": "#268bd23d"
+      }
     }
   },
   "chat_panel": {

assets/themes/solarized-light.json

@@ -972,6 +972,18 @@
           "size": 14
         }
       }
+    },
+    "filename_editor": {
+      "background": "#eee8d52e",
+      "text": {
+        "family": "Zed Mono",
+        "color": "#073642",
+        "size": 14
+      },
+      "selection": {
+        "cursor": "#268bd2",
+        "selection": "#268bd23d"
+      }
     }
   },
   "chat_panel": {

assets/themes/sulphurpool-dark.json

@@ -972,6 +972,18 @@
           "size": 14
         }
       }
+    },
+    "filename_editor": {
+      "background": "#2932565c",
+      "text": {
+        "family": "Zed Mono",
+        "color": "#dfe2f1",
+        "size": 14
+      },
+      "selection": {
+        "cursor": "#3d8fd1",
+        "selection": "#3d8fd13d"
+      }
     }
   },
   "chat_panel": {

assets/themes/sulphurpool-light.json

@@ -972,6 +972,18 @@
           "size": 14
         }
       }
+    },
+    "filename_editor": {
+      "background": "#dfe2f12e",
+      "text": {
+        "family": "Zed Mono",
+        "color": "#293256",
+        "size": 14
+      },
+      "selection": {
+        "cursor": "#3d8fd1",
+        "selection": "#3d8fd13d"
+      }
     }
   },
   "chat_panel": {