Make it easier to jump to a certain position from the progress bar

[ThiefMaster]

Even for short-ish things like TV shows (40 min) it's quite a hassle to seek to a certain position somewhat accurately (and with that I mean 15s precision).

I'm not sure what the best UI for this is, but some quick ideas:

• When dragging, use 5% steps initially (that's 2 minute steps for a tv show, 6 minute steps for a movie). As soon as you stop moving the slider (while still touching the screen), switch to a second one that has high precision (10s maybe? I don't think anyone needs anything lower), but only for the previously selected window (+-1min for a 40m file, +-3min for a 2h file)
• Make the current playback position touchable. Doing so would open an input window where you can enter the position you want to seek to

[titomontes]

Also, in the XBMC remote (previous official remote), the arrowws in the trackpad allowed to skip up to 30 seconds ahead or back (horizontal arrows) or up to 10 minutes ahead or back (vertical arrows), just like the keyboard. It works in many remotes and also in chrome extensions like Play to kodi: https://github.com/khloke/play-to-xbmc-chrome