Revert "[eshcer/layout_field] Factor handleEvent"

This reverts commit d1ebbc685d67702994aa3ef822886a681cee63b9.

There were problems in the calculation app for instance:
- Write 34 then press ans -> the cursor is not drawn right of ans, but
left.
- Write a large layout, go up in th history, then go back to edition:
the view is not scrolled to the cursor

escher/src/layout_field.cpp

@@ -301,6 +301,8 @@ void LayoutField::reload(KDSize previousSize) {
   if (m_delegate && previousSize.height() != newSize.height()) {
     m_delegate->layoutFieldDidChangeSize(this);
   }
+  m_contentView.cursorPositionChanged();
+  scrollToCursor();
   markRectAsDirty(bounds());
 }
 
@@ -401,11 +403,12 @@ bool LayoutField::handleEvent(Ion::Events::Event event) {
     return false;
   }
   shouldRecomputeLayout = didHideLayouts || shouldRecomputeLayout;
-  if (shouldRecomputeLayout) {
+  if (!shouldRecomputeLayout) {
+    m_contentView.cursorPositionChanged();
+    scrollToCursor();
+  } else {
     reload(previousSize);
   }
-  m_contentView.cursorPositionChanged();
-  scrollToCursor();
   return true;
 }