add error icon, statustip -> dialog

icons/error.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#c0c0c0"><path d="M480-280q17 0 28.5-11.5T520-320q0-17-11.5-28.5T480-360q-17 0-28.5 11.5T440-320q0 17 11.5 28.5T480-280Zm-40-160h80v-240h-80v240Zm40 360q-83 0-156-31.5T197-197q-54-54-85.5-127T80-480q0-83 31.5-156T197-763q54-54 127-85.5T480-880q83 0 156 31.5T763-763q54 54 85.5 127T880-480q0 83-31.5 156T763-197q-54 54-127 85.5T480-80Zm0-80q134 0 227-93t93-227q0-134-93-227t-227-93q-134 0-227 93t-93 227q0 134 93 227t227 93Zm0-320Z"/></svg>

icons/icons.yaml

@@ -1,15 +1,16 @@
 color: '#B89230' #Hex code of the color
 icons:
-  newentry: library_add.svg
+  addBook: add_book.svg
+  add_user: add_user.svg
+  backup: db_backup.svg
+  borrow: book.svg
+  duplicate: duplicate.svg
+  error: error.svg
+  loan_extend: calendar_event.svg
   main: library.svg  
-  warning: warning.svg
+  multiuser: multiple_user.svg
+  newentry: library_add.svg
+  report: report.svg
   settings: settings.svg
   user: user.svg
-  multiuser: multiple_user.svg
-  add_user: add_user.svg
-  borrow: book.svg
-  backup: db_backup.svg
-  addBook: add_book.svg
-  report: report.svg
-  duplicate: duplicate.svg
-  loan_extend: calendar_event.svg
+  warning: warning.svg