Search for node content in current language

Verified and tested patch #24 on 10.1.x-dev. Patch applied successfully.

Test Results:
1. When no language is chosen in advance-search and normal search, display results only in current language.
2. Issue #5 point 2 (5.2) is reproducible after applying patch

in the normal Search box you will get two keywords 'chocolate chocolate' which gets increase if you put the same in the advance search.

Basically, keyword searched in Advanced-search "Containing any of the words" field is cleared from advance search box and appended to normal search box. And this results in increase of same keywords - "test test".

Moving to Needs Work

Re-rolled #24 ✨ Search for node content in current language Needs work for latest 10.3.x