Change Details

**Steps to replicate the issue** (include links if applicable): * Edit a page with syntax highlighting or code editor on * Modify the content * Close the tab without saving the changes * Reopen the tab * Click "Discard changes" **What happens?**: Nothing. **What should have happened instead?**: The changes are discarded. That is, clicking "Show changes" shows "(No difference)". **Other information**: The restoration of the content should use jquery.textSelection. == QA Results - Beta | **AC** | **Status** | **Details** | | ----- | ----- | ----- | | 1 | ❌| https://phabricator.wikimedia.org/T353616 [[ https://phabricator.wikimedia.org/T353616#9451941 | here ]] |

**Steps to replicate the issue** (include links if applicable): * Edit a page with syntax highlighting or code editor on * Modify the content * Close the tab without saving the changes * Reopen the tab * Click "Discard changes" **What happens?**: Nothing. **What should have happened instead?**: The changes are discarded. That is, clicking "Show changes" shows "(No difference)". **Other information**: The restoration of the content should use jquery.textSelection. == QA Results - Beta | **AC** | **Status** | **Details** | | ----- | ----- | ----- | | 1 |✅| https://phabricator.wikimedia.org/T353616 [[ https://phabricator.wikimedia.org/T353616#9454590 | here ]] |

**Steps to replicate the issue** (include links if applicable): * Edit a page with syntax highlighting or code editor on * Modify the content * Close the tab without saving the changes * Reopen the tab * Click "Discard changes" **What happens?**: Nothing. **What should have happened instead?**: The changes are discarded. That is, clicking "Show changes" shows "(No difference)". **Other information**: The restoration of the content should use jquery.textSelection. == QA Results - Beta | **AC** | **Status** | **Details** | | ----- | ----- | ----- | | 1 | ❌✅| https://phabricator.wikimedia.org/T353616 [[ https://phabricator.wikimedia.org/T353616#94519414590 | here ]] |