Update CSSProperties.json

Added background-blend-mode CSS property.
Fix for 8192
Implement checkbox option for individual file in search result panel.
Don't show checkboxes in file-sections for the Find Result panel.
Tweaked spacing.
Adjust colspan attribute for file-section to the correct value.
Proofreading

Add new translation, as well as making few changes (space, typo, etc...) to existing translations.
Localized CC BY link
Update strings.js
Update strings.js
Update strings.js

Add SHA1!
Update strings.js
Update strings.js

Correct my errors!
Update strings.js

Add a new string!
remember files that timed out in tern
Add SHA-1
Romanian locale update
fixed json structure
some translations fixes, thanks to @bumbu
Add skeleton of zh-tw translation.