fix: resizing arrow labels (#6789)

* fix arrow labels resizing

- min arrow labels width based on font size
- labels width and padding in % of container's width
- resize labels simply multiplying by scale

* remove no longer needed getContainerDims

* fix arrow labels font size not updated on change font size action

* fix bound arrows not updated right after resize

* fix test

* fix 3+ point arrow label resizing with shift

* fix bound text not scaling when resizing with shift & n or s handle

* fix arrow labels width not updating when moving a 2-point arrow point with shift

---------

Co-authored-by: Aakansha Doshi <aakansha1216@gmail.com>

src/element/linearElementEditor.ts

@@ -264,11 +264,11 @@ export class LinearElementEditor {
             };
           }),
         );
+      }
 
-        const boundTextElement = getBoundTextElement(element);
-        if (boundTextElement) {
-          handleBindTextResize(element, false);
-        }
+      const boundTextElement = getBoundTextElement(element);
+      if (boundTextElement) {
+        handleBindTextResize(element, false);
       }
 
       // suggest bindings for first and last point if selected