[SteamGifts] Additional giveaway search tools

Fixes header to the top of the page so it "moves with it" and adds a search input to it. In addition, adds a "more like this" button close to giveaway's image for searching by item (same as small icon close to the game's name, but more usable).

These are all versions of this script. Show only the versions where the code changed.

  • v1.3.1 2017-12-22 Fixed style that was not being applied.
  • v1.3.0 2017-12-22 Removed now redundant "search more like this" row button and added a search icon to the custom search bar.
  • v1.2.5.1 2017-01-12 Fixed "more like this" button position
  • v1.2.5 2017-01-12 Added back "more like this" button after site changes broke it
  • v1.2.4.1 2016-11-11 Fixed enter all button clicking hidden entry buttons
  • v1.2.4 2016-11-11
  • v1.2.4 2016-11-11
  • v1.2.4 2016-11-11
  • v1.2.4 2016-11-11 Added "Enter All" button (requires Nandee's "Extended SteamGifts" userscript).
  • v1.2.3.1 2016-11-10
  • v1.2.3.1 2016-11-10
  • v1.2.3.1 2016-11-10
  • v1.2.3.1 2016-11-10
  • v1.2.3.1 2016-11-10
  • v1.2.3.1 2016-11-10 Added missing property to "more like this" button style
  • v1.2.3 2016-11-10 Made "search more" buttons no longer open up in new tabs.
  • v1.2.2 2016-11-10 Got search by item on giveaway detail working again and added it back
  • v1.2.1 2016-11-10 Removed non-working search by item on giveaway detail
  • v1.2.0 2016-11-10