Translate: Prepare for recent GlotPress 3.0 changes

[ocean90]

translate.wordpress.org currently runs with GlotPress at ​revision 2331935 (3.0.0-alpha.2). I'm going to update it to ​2702699 which matches the ​3.0.0-rc.1 release.

Changelog: ​https://github.com/GlotPress/GlotPress-WP/compare/3.0.0-alpha.2...3.0.0-rc.1

[ocean90]

In 11732:

Translate: Various styling adjustments following changes in GlotPress 3.0.

See #6246.

[ocean90]

In 11733:

Translate: Override some default styling for form tables.

See #6246.

[ocean90]

In 11736:

Translate: Add suffix to GlotPress' default assets for extra cache busting.

See #6246.

[ocean90]

In 11737:

Translate: Don't change display of labels and use consistent color for warnings.

See #6246.

[ocean90]

In 11738:

Translate: Restore fixed table layout for translations table.

See #6246.

[ocean90]

In 11739:

Translate: Inherit the font size for labels instead of using a fixed font size.

See #6246.

[ocean90]

#6250 was marked as a duplicate.

[ocean90]

In 11741:

Translate: Improve projects overview.

• Use proper grid layout to ensure same heights of boxes.
• Use three columns on large screens.
• Reduce icon size and description length since these don't require to be in the focus unlike in the relevant directories.
• Keep current filters when changing search keywords.
• Show pagination on top and bottom.

Fixes #5945.
Fixes #6249.
See #6246.

[ocean90]

In 11752:

Translate: Sync style overrides with changes in GlotPress 3.0.0-rc.3.

See #6246.