Issue with single quote in string values

[pierrehebert]

There's an issue when recreating the form where quotes in string values don't get escaped. As a consequence it triggers a javascript error, stopping the creation, and the form appears blank.
This can be fixed with the following change:

diff --git a/multiseek/logic.py b/multiseek/logic.py
index addaf30..06f5c02 100644
--- a/multiseek/logic.py
+++ b/multiseek/logic.py
@@ -735,7 +735,7 @@ class MultiseekRegistry:
                     elem['value'])
 
                 result.append(s % (
-                    current_frame, elem['field'], elem['operator'], value,
+                    current_frame, elem['field'], elem['operator'], value.replace("'", "\\'"),
                     prev_op))
                 info.field += 1
 

[mpasternak]

Hey man and thank you for using my software,

your issue has been sitting in my queue for some time, obviously I decided to reply,

I'm thinking if I should write a unit test testing for this exact bug. I mean, I know I should, but ATM I am busy with other projects.

Your code looks legit, but on the other hand, maybe we should use some special slashing function for this? How about ampersand-number sequences in HTML, would this affect quotes too?