* Use target_include_directories to specify include paths
* Specify project root (parent of rtgui and rtengine) as include path
* Replace relative includes with normal includes
Note: This commit has only been tested on MacOS
Changes:
- Icons now use the native hidpi support from Gtk (through Icon Theme)
- Icons are now directly generated from scalable file (i.e. SVG file)
- Widget sizes are scaled based on DPI and scale factor
- Font size is scaled based on DPI and scale factor
Change size_t to std::size_t, remove void from function parameters, use
constants to represent the minimum required number of control lines, and
change const auto & to const auto.
Set the "apply" and "delete all" button sensitivity based on the number
of control lines. Add extra tooltip text to the apply button when
editing and there is not enough lines. The text explains there must be
enough vertical or horizontal control lines.
When exiting perspective control line editing mode while dragging a
control line, set the geometry and control line state to the appropriate
state corresponding to when lines are not being dragged.
