Added documentation about file path filter bar

README.md

@@ -338,16 +338,25 @@ The default TUI is divided into four sections:
 - Bottom pane consists of:
     - Status bar
     - Key binding info
+    - File path filter bar
     - Search bar
 
+File path filter bar consists of the file path filter status indicator and the
+file path filter field.
+The file path filter status indicator shows one of the following values:
+- `OK`
+    - File path filter glob was applied successfully
+- `ERR`
+    - Docfd failed to parse the glob in the field
+
 Search bar consists of the search status indicator and the search field.
 The search status indicator shows one of the following values:
 - `OK`
     - Docfd is idle/search is done
 - `...`
     - Docfd is still searching
 - `ERR`
-    - Docfd failed to parse the search expression in the search field
+    - Docfd failed to parse the search expression in the field
 
 #### Controls