Update themes-settings.html

Fix #8712 (part 1 of 2)
Update themes-settings.html
Update strings.js
Update strings.js

Changes made -- ready for another review
Use resultSet array length for total match count rather than using the length of Marked Text.
Update strings.js

Update translate Italian language for Brackets 0.43
Merge branch 'master' of https://github.com/adobe/brackets
Add unit test.
Fixed Side Bar's quiet button hover border.
Transparent checkerboard for ImageViewer is now dark.
Update README.md
Merge pull request #8774 from Denisov21/patch-16

Update README.md
Merge pull request #8772 from adobe/larz/issue-8771

Transparent checkerboard for ImageViewer is now dark.
Merge branch 'master' of https://github.com/adobe/brackets
Fixed Extenionsion Manager tab focus styling.
Updated by ALF automation.
Merge pull request #8799 from adobe/alf_localization

ALF Automation
Fixed #8800.
Verify the match count with the displayed string.
Merge pull request #8728 from adobe/rlim/total-match-count

Use resultSet array length for total match count