gtk4-prep: fix right-click popups on filter and range entries

[Arecsu]

Right-click on text filter entries (camera, lens, flash, filename, ISO, …) shows the default cut/copy menu instead of the "select existing values" popup.

Root cause: the event controller conversion (#21659) attached the entry press gesture with the default button and bubble phase, so GtkEntry's built-in context menu won over the custom popup handler.

Fix: attach the gesture with GDK_BUTTON_SECONDARY and GTK_PHASE_TARGET, so it claims right-clicks before the entry's default handling. Covers misc.c (camera/lens/flash/…), filename.c (filename/extension), and range.c (range-select entries).

Related: #15920 #20433

Fixes #21720

[piratenpanda]

can you also look at middle click module duplication? Might have been the gtk4 transition as well

[Arecsu]

can you also look at middle click module duplication? Might have been the gtk4 transition as well

Woops, how do I reproduce this one sorry? Just middle clicking the module should duplicate it, and now it stopped doing that?

[piratenpanda]

The icon where you get the menu, the double squares was middle clickable in my recollection and it duplicated the module

[Arecsu]

The icon where you get the menu, the double squares was middle clickable in my recollection and it duplicated the module

Interestingly enough, after search across git history and the code, the middle click seems to be an unintended behavior. A bug. The correct duplication method is by right-clicking it, not middle clicking it. Either way, it is broken in my gtk4-prep. So I'll fix it to right-click. Even the tooltip says right-click. Curious how some of us were used to a way of doing things to find out it was actually a bug 🤣

[piratenpanda]

could have been a right click as well, anyway, would be nice to have it back :D

[dtrtuser]

not sure if you want me to update my #21720 issue but also noticed the same right click issue when trying to create new instance of a module with mouse right-click (imageop.c).

[TurboGit]

Merging this now as fixing an important bug.