a fixed results for content search when navigates through occurences

**how to produce**
1. launch broot for specific folder that contains text files
2. type c/ then your keyword
3. press ctrl+right three times
4. press ctrl+left two times
5. type c/ then another keyword
6. press ctrl+right it will give the same results of step 2

**expected**
the result changes when change the keyword

**note**
for step 4 when you press ctrl+left three times there will be no issue

No files or tests are named. Reproduce the issue in broot using the listed content-search and occurrence-navigation steps, then trace the content-search result handling around backward and forward navigation. Done means changing the keyword after partial navigation produces results for the new keyword rather than the earlier search.

Written by the indexing model from the issue text.