When dark theme is used, sliders (especially progress on fullscreen) tend to look a little too dark (as if they were disabled). To overcome this, add an option to force them to be 20% brighter.
A simple borderless window floating on desktop. Window can be resized and moved by dragging. It also has some minimalistic controls showing on top of the video when cursor is hovering over it.\n\n This was a feature originally requested by @zahid1905.
Previously top revealer was set to fixed size, which caused a noticable video tearing along the revealer edge during its animation. This commit removes fixed revealer size, which in turn casues the revealer to cover whole video screen (default behavior), thus eliminates the tearing. Since overlay now becomes the top widget, all player notify signals were reconnected to it.
This adds Kodi-like semi-transparent overlay with current media title, hour and estimated time when video will end. The overlay is visible only on fullscreen mode.
Follow other GNOME apps designs by having fullscreen button on the right side of window header bar. The control panel had too many buttons already and we still need to make some space for playlist. This way "fullscreen" button will be on top bar while windowed and "unfullscreen" button will appear on the bottom right only when player entered fullscreen mode.
Create volume button with popover instead of using GTK provided volume button.
Creating new button with only needed elements is more efficient then removing unneeded items from pre-made volume button. This should also increase performance a little when changing volume, because now we generate new icon only when a change is needed. In pre-made button icon is regenerated on each volume change.
Loading file too early might lead to Xorg related crash. We must first make sure the player widget is fully drawn, before we start drawing video frames.
