added icons for listview

www/img/icons/printers/list.txt

@@ -0,0 +1,52 @@
+_3Dison_plus
+bigbuilder3d
+builder3d
+bukobot
+cartesio
+colido_2_0_plus
+colido_compact
+colido_diy
+colido_m2020
+colido_x3045
+craftbot_plus
+cyrus
+delta_rostockmax
+deltamaker
+doodle_dream
+eventorbot
+felix
+gigabot
+kossel
+leapfrog_creatr
+lulzbot_aO_101
+lulzbot_taz_4
+makerbot_generic
+makerbot_replicator2
+makerbot_replicator2x
+makerbot_thingomatic
+makergear_m2
+makergear_prusa
+makibox
+mamba3d
+marlin_generic
+minifactory
+orca_0_3
+ord_bot_hadron
+printrbot
+printxel_3d
+prusa_i3
+prusa_iteration_2
+rapman
+renkforce_rf100
+reprappro_huxley
+reprappro_mendel
+rigidbot
+robo_3d_printer
+shapercube
+tantillus
+ultimaker
+ultimaker2
+ultimaker2go
+ultimaker_original_plus
+vision_3d_printer
+wanhao_duplicator4