Feature request: Ignore question numbers

## Description
Have an option that allows text that differs only by a leading question number pattern to be compared and merged.

## Current behavior
**Input 1: source**

EN | FR
---|---
1\. hi |1\. hi

**Input 2: target**

EN | FR
-|-
2\. hi | 

**Output**

EN | FR
-|-
2\. hi | 

## Expected behavior
Output should be:

EN | FR
-|-
2\. hi | 2\. hi