Automatically add hashtags to tweets and G+ posts
Set up 3 to 5 hashtags for Twitter and G+ campaigns and automatically add the hashtags into message assets.
This isn't exactly what is requested here, but may be noteworthy: Oktopost now has a hashtag search function that finds trending hashtags that start with the characters you type after # and allows you to complete the hashtag by clicking the search result.
If that will be considered, it would be great to have it as an option to add/delete hashtag to the posts. Sometimes I put several hashtags in one post - depending on the topic