[fit addon] Restore row content after proposing geometry

- Restore `subjectRow.innerHTML`, using the `contentBuffer`
- Bump version to 0.25

addons/fit/fit.js

@@ -34,7 +34,7 @@
 
         subjectRow.style.display = 'inline';
 
-        contentBuffer = subjectRow.textContent;
+        contentBuffer = subjectRow.innerHTML;
 
         subjectRow.innerHTML = ' '; /* Arbitrary character to calculate its dimensions */
         characterWidth = parseInt(subjectRow.offsetWidth);
@@ -54,6 +54,8 @@
 
         rows = parseInt(availableHeight / rowHeight);
         
+        subjectRow.innerHTML = contentBuffer; /* Replace original content */
+        
         var geometry = {
                 'cols': cols,
                 'rows': rows