Add search button to app pages

Oftentimes, I want to do a search from an app page, not just from the main page. The main reason for this is if I'm looking through apps and find an interesting one, then want to find similar ones or it reminds me of another app I want to search for. Especially since there's currently no similar apps feature (as mentioned in issue #2) which would help somewhat with the first reason (though it still wouldn't fully negate the need for this), it needs to be possible to search for them. The problem with going back to the main ("Available") page to do this is then the position in the current search will be lost.

For example, I did a search for "battery" and scrolled several pages, then decided I needed to try searching for "battery bar" but didn't want to lose my place on the "battery" search. If I could have searched from within an app page for "battery bar" then I could have gone back afterwards, which would take me back to that app page and then back to the original "battery" search, including where I had left off (where the app I did the "battery bar" search from is in the list). This is how it's handled in Play Store.