[Github-comments] [geany/geany] Prefs dialog: Disable overridden pref widgets when project is open (#2316)

[Nick Treleaven]

Fixes #1363.

Similar to #1750, this disables pref widgets that are overridden by an open project. (It doesn't disable the frame label). Instead of editing a translatable label, this adds an info image next to the frame/widget label. A tooltip is set to show when the mouse is over the label or the image. This doesn't try to change the tooltip for disabled widgets, I didn't find a way to implement that easily and cleanly.

![image](https://user-images.githubusercontent.com/1107820/65428866-103ec100-de0d-11e9-91b1-dc038082b1ee.png)

This approach can also be used to indicate which prefs are overridden by document-specific settings.

ATM this only affects the 'Saving files' prefs, but I can add the others.

You can view, comment on, or merge this pull request online at:

  https://github.com/geany/geany/pull/2316

-- Commit Summary --

  * Prefs dialog: Disable overridden pref widgets when project is open

-- File Changes --

    M data/geany.glade (32)
    M src/prefs.c (9)

-- Patch Links --

https://github.com/geany/geany/pull/2316.patch
https://github.com/geany/geany/pull/2316.diff

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