meson: bump version v1.2.7

v1.2.6 release

v1.2.5

Lots of housekeeping.

- Moved Package Format combobox into front page and made it only refresh the Profiles combobox.
- New Flathub screenshots
- Add DOAP file
- Prevent PrefDialog from scrolling by increasing content-height.
- Update deps

V1.2.1 hotfix

- Fix app crash when theme update can't be converted to an integer.
Versions are now stored as strings and tuples.

 - Added two new FGT Features:
     - List of Tabs on Overflow
     - Fullscreen Bookmarks

 - Options now have a "depends" field to indicate if they require
another option to be enabled/disabled.

Update user json

Update pref text

Update metainfo

Add new options for theme v132

Window owns all dialogs (#26)

 * Window now has responsibility to present and manage pref and about dialogs.

 * Improved create_pages() to allow it to create multiple pages in future. Still need to implement ViewStack solution.

 * Added Cachy browser support

AboutDialog Improvements

Added:
* Debugging log file
* Support Troubleshooting
* Release Notes