Fix: Annotator fast context special chars issues & statistics page sy…

…ntax error (#561)

* fix statistics page syntax error

* update ontoportal instances home section title

* fix fast context option in annotator page

* remove special chars from annotator's input on submit to avoid errors

app/controllers/annotator_controller.rb

@@ -210,5 +210,13 @@ def remove_special_chars(input)
     input
   end
 
+  def remove_special_chars(input)
+    regex = /^[a-zA-Z0-9\s]*$/
+    unless input.match?(regex)
+      input.gsub!(/[^\w\s]/, '')
+    end
+    input
+  end
+
 end