column: Ensure the column is at least as whide as its child

This avoids requesting not enough width if the requested maximum width
is smaller that the child's requested minimum width.
11 jobs for column-child-size-fix in 40 minutes and 40 seconds (queued for 53 seconds)
Status Job ID Name Coverage
  Build
passed #256105
librem5
api-visibility

00:02:53

passed #256107
librem5
build-debian-clang

00:03:52

passed #256106
librem5
build-debian-gcc

00:03:20

passed #256108
librem5
build-fedora-gcc

00:17:08

 
  Test+Docs
passed #256109
librem5
build-gtkdoc

00:03:03

passed #256110
librem5
unit-test

00:02:58

43.7%
 
  Package
passed #256111
librem5
package-debian-buster

00:03:25

passed #256112
librem5:arm64
package-debian-buster:arm64

00:07:03

passed #256113
flatpak
package-flatpak

00:02:21

 
  Test Package
passed #256114
librem5
autopkgtest-debian-buster-package

00:03:17

passed #256115
librem5
lintian-debian-buster-package

00:01:17