When opening an image, selecting the next/previous image or syncing the
Filmstrip, the newly selected thumbnail is centered, unless it lies
within the visible area more than 1 thumbnails-width away from either
edge, in which case centering does not occur.
When passing a photo as an argument to the RawTherapee executable, the user wants
this auto-loaded photo's thumbnail to be selected and visible in the Filmstrip.
This turns `IdleRegister::add()` into a template function to make the
provided function pointers type safe. It also adds a `delete_data`
parameter to manage the provided data pointer even in `destroy()`.
- The buttons in the main notebook (ICC Profile Creator, Preferences,
Fullscreen) and the buttons in the bottom-left corner under the preview
(Save, Sent to queue, Send to GIMP) are now consistently flat to match
all other toolbar buttons.
- Progress bar thicker and more centered in their containers.
...thanks to the new MyScrolledToolbar class (guiutils.h/cc). This is
valid for the FileBrowser tab (first and second line can be scrolled
individually) and the top and bottom bar of the Editor(s) tab.
see #4035
- The "light" icon theme is now a little lighter, to increase contrast.
- Toolbox icons are now small.
- Buttons:
- Buttons without labels which use icons as their only source of info regarding what the button does (e.g. the white-balance pipette button) use normal-sized icons.
- Labeled buttons which use icons as an auxiliary source of information (e.g. Auto-Crop) now use small icons. Curve type icons are also small even though they have no labels.
- Colored circles are smaller.
- Curve type icons redesigned and small.
- Hand icons (when panning the preview) redesigned to have a clear outline regardless of background color.
- Magnifier icons redesigned to have a thinner magnifier frame and larger inner parts.
- Perspective, distortion and crop icons redesigned.
- Some small icons were missing the `-small` suffix, now renamed.
