Do not show empty hint when filtering

In the library page, when we set a filter such that no items match, we
no longer show the "Nothing here yet..." hint.
12 jobs for 177-empty-message-shown-when-filtering-in-the-library-page in 12 minutes and 20 seconds (queued for 37 minutes and 44 seconds)
Status Job ID Name Coverage
  Images
manual #52053242
allowed to fail manual
build_image_android
manual #52053239
allowed to fail manual
build_image_ubuntu
manual #52053240
allowed to fail manual
build_image_win32
manual #52053241
allowed to fail manual
build_image_win64
 
  Build
passed #52053252
android_armv7

00:09:03

passed #52053253
android_x86

00:10:40

manual #52053251
macos allowed to fail manual
macos
passed #52053243
ubuntu_appimage

00:12:20

passed #52053244
win32_build

00:07:39

manual #52053248
windows allowed to fail manual
win32_vs_build
passed #52053246
win64_build

00:04:56

manual #52053250
windows allowed to fail manual
win64_vs_build